Inside the TARDIS, Charley is impressed by what the Doctor has to show her - it’s huge, much bigger than she imagined. It is, of course, the Crystal Palace, the enormous iron and glass building erected in Hyde Park in London, 1851, to house the Great Exhibition of the Works of Industry of All Nations. She’s amazed by the scale of the thing, but their companion C’rizz claims to be unimpressed. In the six months that the Exhibition was open to the public, it was visited by millions of people, and the Doctor and Charley plan to be among that number, but regrettably C’rizz must stay inside the ship as the Victorians are not quite ready for their first glimpse of Eutermesans. The Doctor uncouples the isomorphic circuits to enable C’rizz to open the door to let them back in, and they promise to be as quick as they can.

The TARDIS has landed on an upper gallery which houses a display of musical instruments from around the world. They look down onto the ground floor and see statues, textiles, gigantic telescopes…there are so many things to see that only now does Charley realise it will take days to look around properly. She races off the get a better view of the 27-foot high Osler Fountain, which they agree would make a good meeting place should they get separated by the crowd.

Meanwhile, Arthur Wellesley, the first Duke of Wellington, checks with Mr Fazackerley that everything is as it should be with the Exhibition and he’s reassured to hear that there have been no problems so far, although with 300 police officers on duty in and around the Palace he expected nothing less. He wants their special guests, Monsieur Christian De Roche and his wife Madeleine, to return home to Paris with good reports. He certainly doesn’t want them to know there was resistance to this showcase or that the British public aren’t completely united in their support for the Queen and the government. At that moment, the elderly Duke is nearly knocked off his feet by Mrs Georgina Marlow who is racing around, looking for her missing 10-year old son, Henry. He instructs Fazackerley to help her find the boy, a task which infuriates the man, while he forces his way through the crowd to make room for his celebrated French guests.

The Doctor has lost Charley already. He greets a young boy who races past and is almost immediately accosted by the angry Mrs Marlow, who rudely accuses him of letting her son get away. She says that if anything happens to the boy now, she will hold him personally responsible. The Doctor inflames the situation by suggesting that, as her mother, she ought to have taken better care of him herself. Suspicious of his behaviour, Fazackerley asks to see the Doctor’s admission ticket. The Doctor claims to have mislaid it, and when it’s suggested he may wish to pay the shilling admission fee again, he admits he has no currency that the man would recognise. Believing him to be a foreigner, Fazackerley leads him towards the main entrance.

The Duke takes a break from his guided tour and sits wearily down on a bench next to Charley. He is instantly in awe of her beauty as well as being pleasantly shocked by her modern behaviour. In return, she thinks he looks very smart in his army uniform and boots and she says he reminds her of the Duke of Wellington. He overhears a comment she makes about the Duke still being alive in 1851, and is bemused when she says she’d always wanted to see the Exhibition. It’s almost as if she’s looking back at current events from a future perspective. He tells her that one of the aims of this event is to unify the world, but his experience as a soldier suggests it will take much more than this to achieve such an objective. He bids farewell to his new acquaintance and returns to continue the tour with Monsieur and Madame De Roche who have been very impressed with everything they’ve seen so far.

Outside the TARDIS, Charley asks to be let back in. She tells C’rizz that she’s lost the Doctor but there’s still lots she wants to see and she only came back to slip into something more comfortable. She tells him about the French dignitaries and C’rizz points out that they’re right outside the door, admiring the strange ‘exhibit’. Monsieur and Madame De Roche are curious about the purpose of a police telephone box, especially as the telephone hasn’t been invented yet. The Duke hasn’t seen the object before, but he deduces that as it’s being exhibited in the musical section, it’s probably some form of musical instrument. They send for someone who might be able to open the box so they can look inside.

C’rizz and Charley watch on the scanner as the visitors move away from the TARDIS and it dawns on Charley that the man she met earlier was really the Duke of Wellington! She is deeply embarrassed to think that she asked him to hold her shoe while she massaged her feet. C’rizz is far more interested in why the French visitors showed so much interest in the ship. He’s worried they might ask for the TARDIS to be transported elsewhere for a closer examination, but as they watch more closely, they see a mysterious man with a gun following the De Roches. Believing him to be an assassin, Charley tells C’rizz to find the Doctor while she goes to warn the police.

Having been ejected from the Exhibition, the Doctor is trying to win the money for an admission ticket by performing magic tricks to the crowds outside. Before long he’s collected twelve pennies, equal to one shilling, and he buys his way back inside. His companions have separated, and C’rizz is approached by a strange man called Jacob Crackles, who’s been watching him for some time. He’s aware that C’rizz has been searching the building for someone or something and when C’rizz tells him he’s looking for the Doctor, Jacob claims he’s recently been talking to him outside. He offers to reunite him with his friend…

The Doctor returns to the TARDIS and is questioned by Monsieur and Madame De Roche who noticed he was about to open the door with his key. He claims to have found it lying around and says he’s been trying various locks at random to find where it belongs. The French couple insist he tries it on the mysterious exhibit and the Doctor’s attempts to wriggle out of the awkward situation meet with no success. He then warns them about the man standing behind them with two pistols in his hands. They believe the Doctor is bluffing and are therefore surprised when the man declares his intention to assassinate the envoys of Louis Napoleon. Monsieur De Roche punches the assassin, then the Doctor bundles the couple inside the TARDIS for their own protection. They are indebted to him for saving their lives, although they are unsettled by the inside of the ship. At first they believe it is a new British design, perhaps by Stephenson or Brunel, and are amused by the Doctor’s claims that it is a travelling vessel. Bizarrely, they seem comfortable with the idea that it’s a revolutionary new hot air balloon of French design!

Fazackerley wakes up a dozing Duke of Wellington in the Royal retiring room and tells him Charley has returned and is asking for the Duke’s help. She warns him there’s a gunman loose in the Palace and that he’s following the French visitors. He realises they must have wandered off alone while he was sleeping and when Charley says she saw them in the musical instrument section, the Duke knows exactly where they’re likely to be heading. He orders Charley to stay behind while he goes to investigate.

Fazackerley is stunned by the sight of the TARDIS dematerialising, but puts it down to a trick of the light. The Duke demands to know why the Doctor was trying to kill De Roche, but he’s unable to provide any convincing answers except to assure everyone the last time he saw the French couple they were both safe and well. As he’s taken away, the Duke orders the Palace to be cleared of all visitors and searched.

As Jacob Crackles leads C’rizz away from the Crystal Palace on the pretext of searching for the Doctor, he tries to find out more about his new acquaintance. C’rizz makes a passing reference to Charley and the fact that he’s a Eutermesan, and is immediately suspicious when Jacob tells him he’d already guessed that as he’s travelled the world and claims to know the Eutermesan people. In response to a test question, Jacob makes the mistake of referring to Charley as a man, but when C’rizz challenges his story and tries to leave, he is knocked out from behind.

Fazackerley returns to Charley and tells her the Exhibition is being closed until tomorrow. She distracts him for a second and runs away, whereupon she is chased through the Palace while she attempts to reach the TARDIS. She arrives at the musical section and is horrified to find the ship has gone. Fazackerley catches her and orders her to leave, but without her friends or the ship, she has nowhere to go and she ends up wandering the streets of London, completely lost in a time sixty years before she was born. She is nearly knocked down by a carriage and is helped by a man named Rufus Dimplesqueeze. She explains her predicament and he offers to take her for a meal.

C’rizz is woken up when a bucket of water is thrown over him. He finds himself in chains and sees Jacob looming over him with a threatening whip. He is ordered to remove all his clothes and put on a thong, whereupon he is thrown in a cage with only straw to keep him warm. His jailor refuses to explain why he’s being kept prisoner, but it’s not long before C’rizz realises he’s not alone. Something is alive and moving underneath the straw…

The Doctor is interrogated by the Duke and Fazackerley, who suspect he wanted to kill the De Roches to upset Napoleon and draw his government into conflict with Britain, which would ultimately lead to revolution, the end of the monarchy and the start of a Republic. The Doctor is confused as to whether he’s supposed to be on the side of the British or the French, but for the Duke that doesn’t matter. He fears that if he doesn’t act, it won’t be long before there is a guillotine outside Buckingham Palace. He plans to send the Doctor to prison on suspicion of murder until they catch the real culprit or someone turns up to vouch for him.

Charley enjoys a hearty dinner with Rufus at an expensive restaurant and slowly starts getting a little drunk. She explains that she’s lost her friends and the only person she knows in London is the Duke of Wellington, who she’d met earlier in the evening. Her host is delighted and decides they should visit him immediately to pay their respects. Outside the Duke’s home, Rufus bangs frustratedly on the gates, but there is no response. When Charley wonders how she can repay him for the meal, he makes an improper suggestion. Charley is horrified and slaps him. She threatens to call the police, then leaves, hoping never to see him again.

The thing that was moving in the straw in C’rizz’s cage turns out to be Maxi the Midget, a fellow prisoner who realises straight away from his appearance that C’rizz has been kidnapped to be exhibited as another ’curiosity’ in Jacob’s sideshow for the amusement of paying customers. The Eutermesan finds the idea humiliating, but for Maxi it’s just a normal way of life. The work isn’t hard and at least he’s fed and kept warm. In any case, he knows he’s unlikely to find any other means of surviving in this day and age. When C’rizz calls out for Jacob, it’s obvious from Maxi’s reaction that the midget is afraid of his owner.

The Doctor is locked up in a police cell, protesting his innocence and declaring it as a travesty of British justice - but no one is interested. No one, that is, except one of his fellow prisoners - Christian Griswold, the man last seen in the Crystal Palace pulling his gun on Monsieur De Roche. The police genuinely have the attempted assassin in custody, but they don’t realise it! Griswold assumes the Doctor is a Lord or a Duke and suspects he’s been placed in the cell with him as a spy to gather incriminating information. The Doctor assures him he’s just as much a prisoner as everyone else in the cell, but Griswold is certain he’s there to find out who paid him to shoot the French dignitaries and help put down the revolution. The Doctor has no wish to get involved in local politics and produces a set of skeleton keys. The other prisoners are all freed but Griswold tricks the Doctor and locks the Doctor back in the cell, taking the keys with him.

Jacob Crackles proudly presents his sideshow to an enthusiastic crowd of paying customers. The first exhibit is Maxi, the smallest man in the known world. The crowd applauds encouragingly, but they are even more amazed when they see the latest addition to Jacob’s parade of oddities - the half-man/half-beast ‘Ker-izzo‘. The appearance of the alien draws gasps of horror from the audience, but Jacob assures them the chains are strong enough to restrain the beast and they come to no harm. He also discreetly warns C’rizz that one false move, one more threat and he will flay the skin off his back.

The Doctor is released from the police cell with an apology from Mr Fazackerley now that Mrs Marlow has vouched for him. The woman claims her husband has a memory problem, which explains why he never mentioned before who he is. The Doctor plays along when his ‘wife’ claims she’d nearly given up all hope of finding him, but now they can finally go home. Fortunately, the fact that he was the only prisoner left behind when they others escaped seems to satisfy the authorities that he wasn’t involved in their escape, so he is free to go.

C’rizz wakes Maxi up and asks for his help in escaping. The Eutermesan is surprised that his friend has never tried to escape before and tries to encourages him to slip between the bars of the cage. The midget is still convinced that they’re better off where they are than trying to survive on the outside world, but C’rizz would rather die than be treated like an animal. Without them, Jacob would have no freaks for his show and therefore no income. Reluctantly Maxi agrees to get the keys from their sleeping jailor’s belt, but the attempt is unsuccessful. Jacob wakes up and proudly shows off a poster of a ’monster’ he’s had drawn up in C’rizz’s image to bring in the crowds. He will be Jacob’s new star attraction and there’s no way he‘s going to be allowed to escape.

As Georgina Marlow and the Doctor cross London by carriage, she asks her ‘husband‘ to tell her what he was up to during the months since they last saw each other. He insists he doesn’t have a wife or a son, but she seems genuinely convinced that he’s lost his memory. Is there nothing left of the man she still loves? The Doctor assures her he doesn’t know who she is so she explains they’ve been married for 15 years and live in Camden Town. He’s a doctor who travels around the world and writes about his discoveries. Before he left on his last expedition, he was ill and his memory was affected. As he’s been missing for almost a year, many people thought he must be dead - but she never gave up on him. The Doctor asks why she mentioned none of this when they met the day before, and she admits she in shock as the Crystal Palace was the last place she expected to see him. In any case, she was too worried at the time about their missing son who is too young to recognise his father. Since that chance meeting, she’d been following him all day and saw him being arrested. He looks and sounds just like her husband (although he looks younger now he’s shaved off his beard), they are both doctors and travellers, and they both enjoy performing parlour magic tricks. The Doctor insists this is all just coincidence, made more important by wishful thinking on her part. She wants her family to start getting back to normal and she plans to write to his uncle to tell him of his safe return from Africa. It’s only fair to put his mind at rest as it’s been almost exactly a year since anyone heard from him. They arrive at a beautiful London house, but before she can persuade him to come inside, he announces his intention to return to the Crystal Palace, and runs off.

Charley has found her way back to the Duke of Wellington’s home, Apsley House on Hyde Park Corner. She tries to persuade Mr Fazackerley to allow her entry but he’s disgusted by the slovenly, bedraggled creature before him and refuses, but on seeing the state she’s in, the Duke invites her to stay for breakfast and asks the maid to run a bath for her. Charley tells him she was inside the blue box at Crystal Palace while he was giving his tour, which makes him wonder whether she is an enemy agent or a spy. She tells him the box is a travelling machine that belongs to the Doctor, and the Duke recalls that this sounds like the man who was arrested in connection with the attack on the De Roches. She’s even more surprised when he adds that they had to let him go when his wife turned up to vouch for his good character.

After failing to explain the importance of his missing box to the police office on duty outside the Great Exhibition, the Doctor reluctantly returns to the home of Georgina Marlow and offers to help her find her husband. She accepts that he will need time to think about what they discussed, but he insists he only came back because he’s lost both his ship and his companions, and she is the only person he’s met who has shown him any kindness. They both believe each other’s mental state is questionable as that can be the only explanation for the way they’ve been behaving, and neither of them seem ready yet to accept the other’s argument. But it’s the beginning of a relationship, and Georgina is convinced that his memory will soon return. She’s already told her children that their father has returned, but she sent them away to her sister’s home in the countryside until things can settle down a bit. For now, it’s just the two of them…

Charley presents herself before the Duke. He concedes that she’s scrubbed up well and the dress she’s borrowed from Madame De Roche fits her like a glove. He’s worried that his two guests are still missing, especially as it seems they disappeared while they were inside the Palace. No one saw them leave and it’s almost as if they were spirited away. Charley begins to suspect what might have happened and she reluctantly tells the Duke that the Doctor may have taken them with him on his travels. His concern is that if they’re not found soon, it could be the start of a major diplomatic crisis. Charley is convinced that the Doctor and C’rizz wouldn’t have abandoned her and that they’re bound to come back sooner or later. Until then, the Duke has a possible solution and asks his young friend whether she can speak French…

The Duke’s plan is for Charley to pose as Madame De Roche and despite her concerns, the idea is readily accepted by the sycophantic Fazackerley. This is their only chance to convince the public that all is well with their French visitors and the Duke is convinced that if it fails, the people will suspect they’re hiding something from them and that rioting with ensue. Charley’s height and general appearance is about the same (providing she has some extra padding and wears a wig), and the Duke is keen for her to be seen in public as soon as possible. He persuades her to ride with him along the Rotten Row and assures her that as long as she holds her nerve, everything should be alright. As the Duke and Charley discuss the nature of leadership and courage, the conversation comes round to his age. He’s 82 and he knows he won’t live for much longer. He also recalls from their first meeting that she inadvertently revealed she comes from the future. He wants to know what’s going to happen to his country 50 or 100 years ahead, and she admits that the world will never be completely at peace and that the Great Exhibition will be seen more as a curiosity than a force for change as was intended. However, he personally will be remembered as a great hero.

Jacob Crackles Esq introduces another performance of his ’freak show’ in Piccadilly Circus, and once again warns his audience to be prepared to be horrified and amazed by the half-man/half-beast ‘Ker-izzo‘. This time, however, things do not go so well as C’rizz refuses to co-operate and doesn’t look terrifying enough. C’rizz calls out to the crowd that he’s being held prisoner against his will and when Jacob tries to stop him with his whip, C’rizz begins to struggle with him. He implores Maxi to hit their jailor with a nearby kettle, but the midget strikes the Eutermesan instead. He’s sorry, but if Jacob is killed, no one will be left to look after him.

The Doctor compliments Georgina on the excellent meal she cooked and she explains that she had to let their cook and the housemaid go. She was forced to make economies some time ago as the little money they had was fast diminishing. He’s concerned that she now believes things will get back to normal. He asks about ‘their’ children and although Georgina seems a little uncomfortable discussing the subject, she tells him Eddie is 14 and Henry is 10. The Doctor asks her to join him for a walk in the fresh air … somewhere like Hyde Park, for instance.

The Duke and Charley ride their horses down Rotten Row, the broad track running along the south side of Hyde Park. They acknowledge the greetings from passers-by and so far everyone seems to be convinced she is the genuine Madame De Roche. Charley’s worried she may have broken some laws of time by discussing the future with the Duke, but he assures her he she didn’t say anything he hadn’t already guessed. Charley jumps down from her horse when she notices an advertising poster pinned to a tree. It’s for a freak show in Piccadilly Circus - and it shows a picture of C’rizz!

The Doctor tries to persuade Griswold that Georgina isn’t his wife and that she’s not involved in any dispute between them. The assassin demands money as compensation for not being paid after the botched attempt to kill the De Roches. Fortunately, a police offer arrives on the scene and knocks Griswold out from behind. The Doctor takes a relieved Georgina home.

The Duke has taken Fazackerley and Charley to Piccadilly Circus to investigate the freak show advertised on the poster. They arrive just as Jacob Crackles is delivering his usual patter, introducing the half-man/half-beast ‘Ker-izzo‘. The horrified Duke interrupts the proceedings, declaring the whole thing intolerable. He draws his sword to ward off the indignant Jacob, and when Charley rushes over to greet C’rizz she sees the scars caused by his jailor’s whip. Jacob threatens to take the matter to the highest authority in the land, but the Duke of Wellington is not deterred. C’rizz is released from the cell and demands to be given the sword, but his request is denied. Maxi is also released, although he is still reluctant to leave his life with the sideshow. The Duke warns Jacob that he’ll be keeping an eye on him in the future and if he sees the least sign of trouble he will make it his personal duty to ensure he spends the rest of his life in the Tower of London.

The Doctor comforts Georgina and is impressed by the speed with which she has recovered from her ordeal. She warns him not to expose their children to the dangerous company he seems to be keeping. He reads the newspaper and sees a report on the mystery surrounding the disappearance of the French visitors. Of more concern to Georgina, however, is the observation that the Doctor was able to read the article at all without his spectacles. She finally realises he is not her husband after all. She accepts that deep down she knew this from the very start, but somehow she’d convinced herself otherwise. She begs his forgiveness, but he says that although he’s enjoyed their brief time together, he plans to leave tonight before any more harm is done. The thought seems to terrify Georgina and she begs him to continue wearing the mantle of Dr Edward Marlow until the immediate crisis is over. She explains that she will lose their home and the family will be turned out onto the streets unless she can convince her husband’s uncle, who owns the house and has generously allowed them to live there since their marriage, that Edward has returned. The agreement under which they have lived there states that if her husband dies or if he is separated from his family for one year, the house will be sold from under them. That time period is very nearly up and as no love is lost between Edward and his uncle, he will not be sympathetic to Georgina’s plight. The Doctor offers to help and she asks him to go along with a deception. She pleads with him to stay a few more days, just long enough for word to reach the uncle that the family are back together again. He agrees and is relieved to learn there is a spare bedroom and that Georgina has no intention of being unfaithful to her husband.

At the Duke’s home, Fazackerley treats C’rizz’s injuries and the Eutermesan learns that the Doctor, the TARDIS and the De Roches are all missing. C’rizz still feels bad about leaving his friend behind, but he accepts that they couldn’t force him to leave Jacob against his will. The Duke is satisfied that Maxi will come to no more harm, but in the meantime they have more pressing concerns - averting a revolution. He’s still convinced that the disappearance of the De Roches will lead to public unrest, that people will think there’s a plot by the aristocracy to keep the wealthy and titled in power instead of sharing it amongst the population. C’rizz is surprised to learn that Charley has already told the Duke that they‘re from the future, but her primary concern now is that the Doctor’s apparent ‘kidnapping’ of two foreign diplomats at this time may lead to events that should never have happened and that history will be changed. She explains that she’s been posing as Madame De Roche in public - and the Duke suggests C’rizz would make a credible substitute for Monsieur De Roche too!

The next morning the Doctor greets Georgina and notes that she looks tired. She reveals that Edward’s uncle has written in response to her letter, to say that he will be in London that afternoon and has decided to visit them to convey his regards to his nephew in person. The Doctor suggests bluffing that he’s been struck down by a mysterious illness contracted in Africa, but she fears it’s too late to stop him coming now as he must already be on his way.

C’rizz has now joined Charley on the Duke’s procession down Rotten Row and is disguised as Monsieur De Roche, thanks to a costume and make-up combination prepared by Fazackerley. So long as he can keep concentrating to maintain the correct skin tone, no one should realise he isn’t human. Unfortunately Jacob Crackles is in the area taking down his posters, and he notices them as their horses pass down the street. He approaches the procession and the two impostors attempt to bluff their way out of the situation with atrocious fake French accents. Not surprisingly, Jacob’s suspicions are aroused, but the Duke intervenes with another threat to send him to the Tower. It seems that the more dangerous things get, the more excited the Duke becomes.

Georgina assures the Doctor he will not be to blame if his attempt to bluff Edward’s uncle by masquerading as her husband fails, but if anything, he believes it is her husband’s fault for not making better provision for his family. The Doctor’s stance angers Georgina as she believes the responsibility is equally hers - and the two of them realise they’re having their first married row! As tempers calm, they agree that the best course of action is for the Doctor to claim that his memory is still affected by his illness so they can keep any discussion to a minimum. The doorbell rings and Georgina greets Edward’s uncle - Mr Rufus Dimplesqueeze! He immediately starts complaining about the weather and his bad journey, and demands to see his wandering nephew. The Doctor attempts to make light conversation about the Great Exhibition, but Rufus dismisses it as a frivolous extravagance that can only succeed in keeping employees from their work. For a moment it looks as though Rufus is suspicious of the Doctor, but a few disarming comments seem to put him more at ease.

Back at the Duke’s house, C’rizz is delighted to finally get rid of his uncomfortable disguise. Now that he’s been rescued from the freak show, and she is no longer being mistaken for a prostitute, Charley is actually starting to enjoy living other lives, but C’rizz just wants things to get back to normal. They decide to return to the Crystal Palace to look for the Doctor, but the Duke suggests waiting till the next morning because that’s when he‘s arranged for the next public appearance of the De Roches. C’rizz objects, but it’s too late - the Duke has already notified the papers and the schedule has been finalised. Charley thinks they’ll be lynched, but the Duke assures them no one will have the temerity to question their identities. What could possibly go wrong?

The Doctor and Georgina take afternoon tea with Uncle Rufus and he raises some awkward questions about where ‘Edward’ has been during the last year. If it’s true that he’d lost his memory, how was he able to travel thousands of miles from Africa and find his way back home? He wonders whether their coincidental meeting at the Crystal Palace had anything to do with his agreement about the house. It seems odd to him that Edward returned home mere days before the deadline they’d mutually set was reached. The Doctor finds the uncle’s attitude irritating and starts to question whether he’s truly concerned about the fate of his own flesh and blood. Rufus argues that it is he who should re-examine his commitments to his family. Perhaps it’s time he gave up his aimless travels and accepted a job offer to work with him instead. When Georgina accidentally calls the Doctor by his title instead of her husband’s name, Rufus’s suspicions are roused again. He challenges Georgina to answer a simple question - is this man genuinely her husband or not? Although she sidesteps the question, Rufus decides not to press the matter any further. He is satisfied about Edward’s identity and warmly welcomes his nephew back home.

Jacob and Maxi have collected together all the useless posters and head back to Hyde Park to prepare for their final show before leaving London. Jacob warns the midget that once they’ve left the city, there will be no one looking out for his welfare. Suddenly C’rizz appears and Jacob realises who it was he saw earlier that day in Rotten Row. C’rizz claims he has ’other friends’ that only he can see and he considers whether he should save Jacob from them or leave him to their mercy. Maxi begs C’rizz not to hurt him, but to no avail. Jacob is attacked and when C’rizz disappears, his former jailor discovers that he’s unable to move his legs and is now totally blind. Maxi reminds him that they both need each other to survive, but perhaps for the first time, Jacob needs him more than the other way round. He promises to take care of him … at least for now.

It’s a glorious summer day and the Duke is delighted to see the crowds flocking towards the Crystal Palace, but Charley is worried that it’s the French visitors they’ve come to see. The Duke assures the two impostors that once the crowd have glimpsed them, they’ll soon lose interest. Meanwhile, Georgina reads the Duke’s newspaper article announcing the final public appearance of Monsieur and Madame De Roche and the Doctor assumes means the TARDIS must have returned, bringing its unwanted passengers with it. He invites Georgina to go with him, and for a moment she mistakenly believes he wanted her to join him on his travels. He reminds her she has two young children to look after, but he promises to visit her if he every passes this way again.

Charley and C’rizz pose uncomfortably for the crowds inside the Palace and the Duke implores them to relax and act more naturally. Before long, the interest in them does indeed start to fade. The Doctor and Georgina arrive outside and they realise this is where they first met and where they must now say goodbye. A part of the Doctor wants to stay, but she knows the rest of him craves travel and adventure in far away places. He and Edward are much more alike than they realised. Before he leaves, he asks Georgina one more favour - could she lend him a shilling?

Inside, the Doctor is reunited with Charley, C’rizz, the Duke and Mr Fazackerley. Realising the crowds are starting to notice something odd, the Duke decides to circulate stories about using decoy diplomats to foil any further assassination attempts. As they swap details of their experiences, the time travellers hear the familiar sound of the TARDIS materialising on the upper floor and they make their final goodbyes to the Duke before heading back upstairs. Monsieur and Madame De Roche emerge from the ship, convinced they were left inside for their own protection. They enquire again about buying the device, but the Doctor tells them it is priceless. The travellers say goodbye to the diplomats, then return to the TARDIS to continue their journeys.