Percy was deeply engrossed in his book; feet up on the console and humming the tune to a song he was listening to while shaving that morning. The book was an old one, an absolute classic; Harry Potter and the Prisoner of Azkaban. Percy loved his classic novels and would often read to pass time, and to avoid the wrath of his sister Isadora. At the moment he was re-reading the Harry Potters and very much enjoying them. There was an extensive library on board the Armstrong and Percy liked to balance between reading books he was unfamiliar with and re-reading those he had fallen in love with. Opposite him, separated by the thick window of the cockpit sat the rocky surface of Ganymede; the largest moon of Jupiter. Jupiter was rising over the edge of the moon, but this sight, while magnificent in its own right, was so common to Percy that he didn't even really notice it.

A shrill series of beeps snapped Percy back into reality. He snapped back upright and placed the book on a part of the console that didn't seem to be riddled with important buttons and monitors. A red light on the console was flashing red in sync with the beeping. Percy examined the monitor below the light. The ship's radar system was displayed on the monitor. On the edge of the display there was a faint blue dot, which was growing stronger and moving more towards the centre of the display. At last, thought Percy, they've found us.

He leant forward and spoke into the square microphone that protruded out of the console. "Isadora, Isadora!" he shouted, transmitting to the ship's PA system. "Isadora meet me in the cockpit immediately, there's something coming this way!"

Minutes later Isadora; Percy's twin sister ran through the archway into the Armstrong's cockpit. She was wearing a blue bathrobe and a matching towel over her head. "What's going on?" she asked, excited and anxious at the same time.

"Were you having a bath?" sniggered Percy.

"No," frowned Isadora, "and never mind that, what about the incoming object?"

"Oh yeah," said Percy, leaning forward and pressing different buttons on the console. "It looks like a ship."

"They've finally answered our distress call," said Isadora, her eyes wide with excitement.

"Well, here's hoping," said Percy, "I'll just open the communications channels. This is acting senior officer Percy Darlington of the Earth vessel the Armstrong. Do you read me?"

"Acting senior officer?" scoffed Isadora, "who made you senior officer?"

"Me," said Percy, "the one sitting in the chair, the one not wearing a bathrobe."

Isadora's response was cut out by that of the incoming ship's. "Armstrong this is the T-59P, reading you loud and clear. Are you in trouble?" The voice was hard and serious, and probably one of someone who didn't have time for fun and games.

"Yes T-59P, our engines are dead and we've been stranded for nearly three years; Earth time."

"And your crew?"

"Just two, both in good health."

"Standby, I'll be aboard in due time."

"Thankyou T-59P. Armstrong out."

Percy closed the communications channels and turned to face Isadora. "Well that's it Izzy, we might finally be getting off here." He looked her up and down. "You might want to make that bath a quick one."

Isadora shook her head and walked off. After three years with only Percy to talk to, any company would be good company.

"So," said the Doctor, walking into the console and grabbing the lapels of his jacket, "what do you think?"
Clara looked him up and down. His jacket was very smart, and probably tailored. Its lining was not of ordinary silk, but of a predominantly red tartan. Under the jacket he wore a scarf in two different shades of grey. Under this was a white t-shirt bearing what appeared to be a slogan, although Clara could not read it, for it was written in the Doctor's native language of Galifreyan, a language she was unfamiliar with. A pair of faded denim jeans and a black pair of Dr. Martens boots completed the ensemble.
"Well," she said, unsure on what to make of the Doctor's new ensemble. Mere hours ago he had looked roughly her own age, but dressed like an old fashioned gentleman. Now he looked old enough to be her father and looked a lot more… trendier. She liked the look, but she didn't know whether it would suit the Doctor, primarily because at this moment, she didn't even know what would suit the Doctor. "I think you look really cool." It seemed to be the safest thing to say at that moment.
"Cool, yes, cool," he said, now rubbing his hands up and down the lapels, "I look cool. Isn't that right Clara?"

Clara looked around the console room, as if there were someone to disagree with the Doctor. "Oh yeah, really cool," she repeated. She had known that the Doctor's regeneration would have changed his appearance and personality, but she was totally oblivious to just how different he would be to the Doctor she knew.

So far he had been acting like a child trying to impress an aunt or uncle they hadn't seen for a long time. They had been examining new potential outfits for the Doctor for the past hour or so, until Clara, growing impatient of the conflicts of what was cool and what wasn't between the pair, decided to wait in the console room while he dressed himself how he saw best.

"Yes, cool," repeated the Doctor for what felt like the millionth time to Clara. "Not like that bow-tie I was wearing. That was so uncool, what was I thinking?"

Clara shrugged her shoulders. "I don't know, probably just a phase."

The Doctor clicked his fingers and grinned. "Yep, that's exactly what it was, a phase. Don't you just hate those?" He began pacing the console room. "When you do something for ages and then one day you stop, and then you remember and you go-" The Doctor made a small groan of desperation and buried his face in his palms.

"Oh yeah," said Clara, nodding and remembering many regretful life choices she had made over the years.

The Doctor walked up to Clara and cupped his palms around her chin. "That's what I've always loved about you humans, you're fallible in exactly the same way Timelords are. That's probably why I like spending so much time with you. Now!" he exclaimed, clapping his hands, "where do you want to go?"

"I don't know," said Clara casually, "you choose."

"Alrighty then," said the Doctor. He turned towards the TARDIS's console and froze; his face blank. "I don't know." He turned back to face Clara. "Where do I want to go?"

"What are you asking me for, silly?" she replied, walking around him. "Why not take me to your favourite place?"

The Doctor scrunched up his face in concentration. "My favourite place?" he said, trying to remember. "Oh I know, the Indigo Valleys on Celeste."

"That's your favourite place?" said Clara, "you took me there a few weeks ago and we nearly got eaten."

"Well it's supposed to be fun," huffed the Doctor.

"If you can't chose somewhere I will,"

"No, no, no!" said the Doctor stubbornly. "I've thought of somewhere. Somewhere I've never been before. Jupiter!"

"You've never been to Jupiter?" asked Clara.

"Not in the 23rd Century," said the Doctor in a very matter-of-factly manner.

"Well then scarf boy," said Clara, tugging on his scarf, "you take us to 23rd Century Jupiter.

"Hey, hey, hey," said the Doctor, straightening his scarf. "Leave that alone, this was a birthday present from a good friend."

"You have birthdays?" asked Clara rhetorically as the Doctor began running around the console, flicking switches and pulling levers.

"Oh too many to count, my dear," said the Doctor as the TARDIS began to shake and make the distinctive noise that told the Doctor and Clara they were travelling through time and space, "too many to count."

Isadora was cupping a mug of hot tea in her hands, eyes fixed on the radar but mind very much elsewhere. For the second time in days there was a series of shrill beeps and she leant forward. Sitting right near the centre of the radar was a dot, brighter and bolder than that of the T-59P. What's more, it had appeared out of nowhere, rather than making its way towards the Armstrong as the T-59P or any other spacecraft had. I must be going mad, Isadora thought to herself. Whatever it was out there, it wasn't there a minute ago, I swear. She leant forward to the microphone. "Perce, Perce, you'd better get here now."

On the surface of Ganymede, the largest moon of Jupiter, some 500 metres out from where the Armstrong sat, but obscured by a large rock formation, the doors of the TARDIS opened. The Doctor and Clara stood in the doorway, both wearing spacesuits and clutching matching helmets. The Doctor's spacesuit was a distinctive orange, but Clara's was a patchwork of many different colours, all very bright and clashing with one another.

"I never knew you made me a spacesuit, when did you get around to doing that?" Clara asked the Doctor. She had only received the suit minutes before.

"Oh, I did it ages ago," said the Doctor. "I thought it would be handy for you to have one."

"Why all the colours?"

"I wasn't sure what colour was your favourite, so I picked all of them."

"Ah, right-o," said Clara, imagining the Doctor; not this one but the previous one, sewing together different patches of material and scratching his head over what colour would suit her best. She missed that Doctor so much already, with his childish manner and inability to understand perfectly ordinary things. "You know I could have just settled for orange like yours, spacesuits aren't really supposed to be trendy."

"Matching spacesuits," scoffed the Doctor, "what do you think we are; tourists?"

Clara looked around at the barren landscape around her. "Of course we are."

The Doctor smiled. "So we are, it's been so long since I've thought of it like that; tourists."

"I suppose it's all just saving the day to you, isn't it?"

"More often than not," said the Doctor, his smile fading. "Still," he said, clapping his hands, the noise muffled under his gloves, "today can be different. Today we can be tourists. It might not be the prettiest place, but it should be peaceful enough to avoid adventure." He turned to face Clara, his worry beginning to show. "I'm getting old Clara, as much as I'd hate to admit it. Let's just try and have some fun. Now, helmets on!"

The two placed their helmets over their heads and walked off out onto the surface of the moon.

"What is it?" asked Percy, storming into the cockpit.

"Another UO," said Isadora, "but this one's different."

"How?"

"It just showed up."

"What do you mean?"

"I mean it wasn't there one minute, and the next it's nearly on top of us, look!" Isadora pointed at the blip on the radar. "It appeared right there out of nowhere."

Percy looked doubtful. "Are you sure you just didn't miss it?"

"No, I looked at the radar and it was blank like always, so I was sitting back with my tea for a moment, only one moment I swear. Then I heard the radar beeping and it was there, right where it is now."

Percy stroked his chin, "have you tried making contact?"

"Yes but I'm not getting any response. The scanners suggest it's a craft of some kind though."

Percy looked out the cockpit window and bit his lip. "Izzy, I think there's something going on. I mean, we've been stranded here for years and then days after we finally make contact with someone another UO shows up. Whether it appeared out of nowhere or not, that's just weird. And Aurelius never said there would be anyone else coming."

Isadora looked her brother in the eye. "You didn't leave Aurelius on his own did you?"

"I had to, he was busy working and he couldn't just stop to follow me here." Isadora frowned, put down her mug and crossed her arms. "Honestly Isadora, don't look at me like that. Why don't you trust him?"

"I just don't. There's something about him that makes me uneasy."

"Is it because you don't know him?"

"Possibly," admitted Isadora, although the stranger who answered their distress call still gave her a bad vibe whenever they were in the same room.

"You don't trust me either though Izzy, remember that," said Percy, smiling.

She rubbed his shoulder. "That's because you're my brother. I've never trusted you." She smiled too and began to walk out of the cockpit.

"Hold on, where are you going?"

She paused and turned around, "to keep an eye of Aurelius. You keep an eye on that radar and let me know if you see someone approaching."

Percy gave her a mock salute and sat down in the captain's chair, looking out at the surface of the moon for any signs of life.

The Doctor and Clara walked, hand in hand across the grey, rocky surface of Ganymede. From the TARDIS, they headed straight towards the rock formation blocking the Armstrong from their line of sight. When they reached the formation, they began walking around it, Clara brushing it with her glove. "You know," she said, "if it weren't for the general lack of oxygen, this would be a great place for a picnic."

"If it's a picnic you want Clara Oswald, then a picnic you shall have," said the Doctor. "Once we get onto a suitable planet, of course."

"Of course," said Clara, turning to the Doctor and smiling.

The Doctor smiled back; a fond smile that showed his mind was at ease. "We should have done this sooner."

"Done what, walk on a big grey rock?"

"No, just go for a walk somewhere. I've forgotten how much I enjoyed just exploring."

Clara was about to respond but was cut short as the Armstrong crept out from behind the rock. They stopped and stared at it.

"Speaking of exploring," said the Doctor, "what do you think?" He grinned, and gripping her hand tightly, began walking towards the marooned ship.

"Well," said Clara, "so much for avoiding adventure."

"Izzy," said Percy over the PA system. "I can see two figures in spacesuits; they're making their way towards the ship.

Isadora walked up to one of the many intercoms situated along the corridors of the Armstrong. "Describe them," she said, speaking into the thin metal grille.

"One in an orange suit, the other in one that appears to have quite a few colours," said Percy, leaning against the window and squinting to try and better identify the strangers.

"What airlock do they look like they're making their way towards?" asked Isadora.

"They seem to be coming towards starboard. I'd say Airlock Two, that's the closest."

"Making my way there now," said Isadora, forgetting about Aurelius and making her way towards the ship's second airlock.

When she reached the airlock, Isadora turned on the closed circuit camera situated outside Airlock Two and began watching it on the television screen situated next to the airlock's internal door. She could see the two figures in their almost matching spacesuits walking up to the airlock's external door. The taller of the two, in a plain orange suit, knocked cheerily on the door. The noise boomed through the corridor. Through the low-resolution camera, Isadora could see that under their helmets, they appeared to be human or at least humanoid in appearance. She pressed the button the opened the external door and watched through the internal door as the taller figure stepped into the airlock and helped the shorter one in.

When they were both in safely Isadora shut and locked the external door and began feeding oxygen into the room. When the room was fully pressurised, a green light lit up on the roof of the airlock and the taller figure removed his helmet. He looked like he was in his mid-50's, with greying hair and a few developing wrinkles. The other person removed their helmet shortly after. This one was a girl, about thirty years younger. Maybe his daughter, thought Isadora. She had medium-length brown hair and matching eyes.

Isadora pressed a button on the control panel by the airlock door which allowed communication between the airlock and the corridor. "This is acting senior officer Isadora Darlington, state your name and intention."

"I'm acting senior officer," said Percy, who was listening in on the conversation from the cockpit, "me!"

"Hello," said the man, "I'm the Doctor, and this is Clara. We were just in the neighbourhood and saw your ship, are you stranded?"

"Yes," said Isadora, startled at the apparent relaxation of this 'Doctor character'. "What do you mean you were in the neighbourhood? Doctor who?"

The 'Doctor' turned to Clara and smiled. "We landed on this planet to do a bit of exploring, you know, chill out a bit? And we saw your ship, so we thought we'd explore that too. Have we come at a bit of a bad time?"

Again, Isadora was perplexed by the man's calm and casual manner. "How do you land here? Our radar showed no signs of you coming in to land at all."

"Yes, that'd be right. My ship's pretty quick, a sort of blink-and-you-miss-her sort of thing."

"But- but why didn't you respond when we tried to communicate with you?" Isadora did not understand this man at all.

"Yeah," asked the young girl, "how come we didn't answer?"

"Oh, I turned off the communication channel years ago. I had to, always someone trying to sell you something. Are you going to let us in now? I brought some biscuits."

"Let 'em in Izzy," said Percy over the PA, "they should be fine."

These people were weird, though Isadora, weird but probably not dangerous, and in any case what could two strangers do to her and Percy that was worse than being marooned on a distant moon? No, Percy was right, they would be fine, she told herself firmly, and eyes firmly set on the strangers, Isadora pressed the button that opened the door between the airlock and the corridor.