“Doctor Who” Season 9 finale is taking the Doctor (Peter Capaldi) home. The Twelfth Doctor returns to Gallifrey in episode 12, but it isn’t a warm homecoming. Find out what viewers need to know about the finale below:

1. Doctor Goes Dark – Showrunner Steven Moffat warned fans not to expect the Doctor to return to his lovable, goofy self any time soon. He doesn't have the best relationship with his own kind anymore. “They’ve exiled him. They’ve tortured him. They’ve trapped him. They’ve killed his best friend. Now he’s going home,” Moffat explained to the BBC. “He’s not quite the lovely man he was before. The Doctor, as it says in the title, this time is ‘Hell Bent.’”

2. The Hybrid – As previously reported, it seems the Doctor might not be the Hybrid, despite claiming that he was in the last episode. The synopsis asks, “Who is the Hybrid?”, implying that audiences haven’t discovered the truth yet.

3. The Time Lords Are Afraid – The Time Lords aren’t throwing a welcome home party for the Doctor. In a sneak-peek video, the President (Donald Sumpter) seems to be worried about his arrival. Watch the clip below:

4. Ashildr Has Changed – Unsurprisingly, Ashildr (Maisie Williams) will again evolve. This time, she’ll be older than the Doctor. “By the end she’s way ahead of him. She’s much older than him and she can nail him and understand him,” Moffat told Radio Times.

5. No New Companion – Although Clara (Jenna Coleman) was introduced in Amy’s (Karen Gillan) last season, “Doctor Who” will wait to introduce the Doctor’s next best friend. Moffat explained that a new companion offers a chance to bring in new viewers, so it makes sense that she won’t be introduced in the finale. “I’m beginning to have an idea of the kind of person, specific ideas but not a specific actress,” Moffat added. “A new companion gives us the chance to launch the show again.”

6. Peter Jackson Is Not Directing – Despite reports that the “Lord of the Rings” director might step behind the camera, Jackson isn’t responsible for “Doctor Who” Season 9, episode 12. Rachel Talalay directed the finale.

The “Doctor Who” Season 9 finale airs Saturday at 9 p.m. EST on BBC America.