All the Legs and Things:
It was a peaceful day on the TARDIS, but never for long. In fact, the Doctor had just taken Amy and Rory to the forest planet of Chibbar, and as they re-entered the TARDIS he rubbed his hands together excitedly.
"All right, where to next?"
Amy groaned and leaned against the railing.
"Doctor, I've been hiking all day in sandals with barely any sole. Can we just get some rest?"
"I'll make some lunch," Rory offered. "It's….this way to the kitchen, right?" He pointed to the left.
The Doctor pointed in the opposite direction. "Down those stairs, through the second door on the left, past the games room, up the spiral staircase, fourth door on your…" he closed his eyes and waved his hand. "….right. Good luck."
Amy left for the Ponds' room, Rory left to try and find the kitchen, and the Doctor began wiping down the TARDIS console. Any specks of dust were quickly found and made scarce.
After about five minutes, the Doctor heaved a sigh and look around.
"This is boring."
From the vicinity of the Ponds' room, there was a feminine scream. The Doctor grinned and threw his rag down.
"That's more like it."
The Doctor arrived shortly before Rory did.
"What is it?" They chorused.
Amy was standing in the middle of their room, backing away from a black spot on the carpet.
"It's a spider, an enormous spider! Just fell out of my hair, I must have picked it up on Chabbar!"
Rory began to laugh, and then covered it up with a cough after his wife's glare.
"Sorry. I'll get it for you, Amy. Doctor? Could you please—Doctor?"
The Doctor was staring at the admittedly quite large spider on the ground and slowly backing out of the room.
"I don't like spiders," he said slowly. "They've got all the legs and things."
"Oh, come on!" Amy said, looking up from the arachnid on the floor. "I know you, you're not scared of practically anything."
"A thousand years or so, Amy, I've been around," he said, grabbing the door jamb. "And spiders don't usually get into the TARDIS. If they do, I know that…she is coming for me."
"Uh…who?" Rory asked.
"The Spider Queen," the Doctor whispered, staring at him. "She killed me."
"Wait, wait, wait," said Amy, putting her hands on her head. "What do you mean, 'killed you'?"
"This is my eleventh body, Amy. The queen of the spiders killed my third." The Doctor grabbed Amy's hand and pulled her out of the room. Rory sighed and entered the room to do the honors.
"My friend Sarah Jane and I were on this spider planet. Things….happened. It's—well, it's a long story that I don't care to remember the most of, but in short, there was this enormous queen spider. I ended up being poisoned by her. So now whenever I see an unusually large spider, I think that it could be one of them. Her children, sent to spy on me."
"Er…right," Amy said. "What did you look like back then? Do you keep looking older each body? Would you look five or something in your third body?"
"Don't be ridiculous," he scoffed. "I'm sort of getting younger, actually. Not steadily, but my past few bodies have looked much younger than my first. Third body had some great fashion sense—"
"—well, that's changed," Amy muttered.
"—and gray hair. And some cool martial arts skills. And…well, I wouldn't say that he liked guns, but he certainly used them a lot more than I do."
"So that body died…and turned into what?"
The Doctor's eyes went distant. "Four. I can't say that my fashion sense was much better in that body. But I had wonderful curly hair. People kept pulling it, for some reason."
"Well, that's done," Rory said, emerging from the Ponds' room holding a balled-up tissue.
"Good," said the Doctor, running back down the corridor. "I'll drop us off on the ocean planet of Aquafortis and we can throw it in the water."
"What were you two talking about?" Rory asked Amy as they followed him.
"Some very…revealing stuff. We'll have to ask him more about it later."