Doctor Who's TARDIS has already picked up it's next passenger.

The BBC series bid farewell to Clara Oswald (Jenna Louise Coleman) last fall, and now fans are anxiously awaiting the reveal of Twelve's (Peter Capaldi) new companion. After all, there are a lot of things you need to get across this universe - warp drives, wormholes, and a hand to hold.

We won't meet that new hand until the end of the year, but luckily, Capaldi and Steven Moffat have dished out a few teasers. One thing we know for sure? Twelve's new travel buddy will be female.

"I think the companion has to be someone who's not so impressed by the Doctor - she's not an assistant, she's not a servant, she can't be that," he explains to La Lata TV, via Zap2It. "She has to be someone who really says, 'Are you sure that's the right thing to do? What are you doing?' and also doesn't take him seriously."

In other words, the next person to step in the TARDIS shouldn't be intimidated by Twelve's gruff demeanor. Capaldi has already started to work with the mystery woman, and the actor recently confirmed that a fresh new dynamic will sweep over the series when out new heroine arrives.

"Clara had prior knowledge of the Doctor. It was conceived as a human connected to your timeline, and so had access to the cosmic nature of the Doctor," Capaldi told Entertainment Weekly. "She understood a little about how he was. And as she was already with Matt [Smith], she knew the Daleks and the TARDIS. Now we have someone who knows very little about the Doctor."

Will the Doctor's new cohort be able to keep him in line? Find out when Doctor Who returns to the BBC and BBC America on Dec. 25. Click the video below to see a preview for the series' latest season.

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