"Right! 13 Bannerman Road!" Ten cried as the TARDIS landed and he ran to the door. Eleven and Nine followed after him. As the doors creaked open, they found themselves in Sarah-Jane's backyard. Across from them a house door opened and three figures came running out.

"Lukey-boy!" Ten said with a smile and clapped him on the shoulder.

"Is mum with you?" Luke asked anxiously. Ten grew serious.

"I'm afraid not Luke. But we're going to find her. I promise." Luke nodded.

"Sarah-Jane has a son?" Nin couldn't help but mutter.

"It's a long story." The girl beside Luke said. "Who are you anyways?"

"I'm The Doctor. Well, one of me anyways." Nine told them.

"He's a past regeneration." Eleven said.

"But that doesn't matter right now." Ten told the kids, seeing their confused faces. They didn't' have time to explain right now. "Were any of you actually with Sarah when she was taken?" He asked. All three of them shook their heads.

"She was up in the attic." Luke told them. "Talking to Mr. Smith about something."

"Great." Nine muttered. "Another dead end. Just another stupid ape. And when did Sarah get married?"

"No, no, no! This is brilliant!" Ten corrected him.

"Because Mr. Smith isn't a human!" Eleven added.

"Sarah married an alien?" Nine asked confused.

"Mr. Smith is a computer." Ten told him.

"A super computer!" Eleven added.

"So if anyone should be able to tell us what happened to Sarah and the others, Mr. Smith should!" Ten exclaimed. Slowly, Nine's smile grew as he understood.

"Fantastic!" he said.

"Right! To the attic! Allons-y!" Ten said, striding towards the house. Together they clumped up the stairs into the attic.

"Mr. Smith! I need you!" Luke called as he burst through the attic door. With his usual fanfare, Mr. Smith appeared from within the attic wall. Nine couldn't hid his admiration.

"Fantastic…" He whispered to himself.

"Yes Master Luke?" Mr. Smith asked. "What can I do for you?"

"Mr. Smith," Ten said, stepping forward. "Were you talking to Sarah-Jane when she was taken?"

"Indeed I was Doctor." Mr. Smith said. "Playing visual feedback." A box popped up on the screen and the three Doctors as well as Luke and his two friends watched the clip that played closely. It showed Sarah-Jane standing in the attic, and then suddenly she was just … gone!

"Play that back again. Slower this time." Eleven told Mr. Smith. The clip rewound then played again in slow-motion.

"Pause it!" Ten shouted. The clip froze just as Sarah-Jane disappeared. Ten whipped out his glasses and peered at the screen.

"What is it Doctor?" Luke asked. "What happened to Mum?"

"It's not a transport of any kind…" Nine muttered.

"It's like, someone of something literally picked her up and moved her." Eleven said.

"Hang on… Can you zoom in on that a bit?" Ten asked pointing at a corner of the screen. Mr. Smith complied. "Can you make it any less blurry?"

"I'm sorry, I cannot." Mr. Smith told him.

"What does that look like to you?" Ten asked his other selves. They peered in closer, examining the black blur.

"Oh, that is not good." Eleven muttered. "That is extremely not good."

"What is it?" Nine asked.

"He must have thought that without our companions, there would be chaos…" Ten said, thinking aloud.

"So he took them out of Time and Space, erasing their very existence." Eleven added. Nine looked back and forth between the two of them, confused. But then it dawned on him.

"O… How in Rassilion's name are we supposed to rescue them now? The TARDIS isn't going to get there!"

"Where?" Luke broke in.

"What's happened to Sarah-Jane?" the other boy asked. The Doctors looked back at them as if just remembering they were there.

"Oh, right!" Nine said. "Well, have you heard a creature called 'The Trickster?'" he asked.

"Actually, we have." The boy said. "Several times now."

"Right, well, he's the one who's taken everyone, including Sarah."

"She doesn't like to be called Sarah." Luke couldn't help but say.

"She does by me." Ten said.

"But you can rescue her, right?" Luke asked hopefully.

"It's not that simple." Eleven said. "If The Trickster's taken them that means he's removed them from Space and Time completely. Taken them into his realm. Into Limbo. The TARDIS isn't designed to do that. It doesn't have enough power." Luke's face fell.

"Don't worry Luke." Ten told him. "We'll think of something. We just need to find a way to boost the TARDIS's power." There was a thoughtful silence.

"It's a shame you don't have more than one TARDIS." The other boy said. "Then you could just use the power from both of them to power just the one."

"Clyde, that's brilliant!" Luke cried. "If you could use the engines of another TARDIS to boost the capacity of your TARDIS, you just might make it!" The Doctors looked at each other.

"You know, that just might work…" Ten said, thinking through the math in his head. He looked up at Nine and Eleven as his smile grew. "In fact, we have more than just two TARDISs, we have three!"

"Won't that cause a paradox though?" Nine asked. "Three TARDISs all at different points in her timeline, forced together. It could rip a hole in the Universe the size of Belgium!"

"Not if we do it right." Eleven said thinking. "If we're very, very careful, we just might do it!"