It's time to start thinking about the Doctor Who season 9 finale.

Peter Capaldi On Set PHOTO, What Is Twelve Up To In 'Doctor Who' Season 9?

Yes, we know the Time Lord won't return to the BBC until next fall, but the iconic sci-fi series is already filming for the ninth season. With the commencement of production comes a outpouring of spoilers, and showrunner Steven Moffat has already kicked off the finale discussion.

"I know what [Season 9's] arc is, I know where we're going, I know what's going to happen in broad terms throughout the show," Moffat teased, according to an episode of Doctor Who Extra. "It's feeling very exciting!"

'Doctor Who' Season 9 Spoilers: Steven Moffat Teases Two-Part Episodes, Reveals Air Ord

As such, the writer already knows what suspenseful story will lead into the 13th episode.

"I've figured out the cliffhanger to the penultimate episode of [Season 9]," Moffat told Doctor Who Magazine (via Cult Box). "And it's a whopper. Ohh, I don't think you'll see this coming!"

It looks like episode 12 and 13 will be another two-parter, a stylistic device that will be utilized throughout the ninth season. It was previously announced that episodes three and four will follow this format as well.

Find out more when Doctor Who returns to BBC and BBC America later this year. Click the video below to see a preview for the series' latest episode, "The Last Christmas."

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