Doctor Who kept Peter Capaldi in the dark as filming for the season 9 finale began.

'Doctor Who' Season 9: Goodbye Steven Moffat? Toby Whithouse On Showrunner Rumors

Capaldi, who plays the current and Twelfth incarnation of the iconic Time Lord, went through an entire season of filming without knowing what showrunner Steven Moffat had planned for episode 12.

"This year in particular they have kept me in the dark," Capaldi informed Den of Geek prior to shooting for the season finale (work has since begun on Moffat's two-part closer). "It comes out through gossip, because I hear things and people have to put costumes together, and the crew generally walk around with scripts [laughs] of episodes which I don't see. Steven, generally, in the two years I've done, he's always given me an evening where he's taken me through the whole series, but in this instance, I don't know what's happening at the end."

'Doctor Who' Season 9: Finale Title Teases David Tennant's Return? Script PHOTO Revealed

There have been rumors that David Tennant's Tenth Doctor is slated to make a return as season 9 wraps up, but, alas, Capaldi could not shed any light on the actor's potential involvement. As much as viewers are itching to know plots in advance, Capaldi is perfectly happy taking the story one script at a time.

"I think it's easier [not to know]," Capaldi said, according to Den of Geek. "I'm not sure I would be able to act better if I knew. If the Doctor doesn't know what's going to happen to him, how am I supposed to, what would I do, if I knew?"

Are you as zen as Capaldi, or are you dying to know what Moffat's season 9 end game is? Sound off in the comments below!

Tune in to the BBC and BBC America for the Doctor's return on Sept. 19. Click the video below to get a peek at what's to come.

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Doctor Who, Television, BBC