BBC has released two new photos and the official trailer for next week’s ninth episode of ‘Doctor Who’ Series 8, “Flatline.”

Episode Summary:

Separated from the Doctor, Clara discovers a new menace from another dimension.

But how do you hide when even the walls are no protection? With people to save and the Doctor trapped, Clara comes up against an enemy that exists beyond human perception.

“Flatline” Stars: Peter Capaldi (The Doctor), Jenna Coleman (Clara), Samuel Anderson (Danny Pink), John Cummins (Roscoe), Jessica Hayles (PC Forrest), Joivan Wade (Rigsy), Christopher Fairbank (Fenton), Matt Bardock (Al), Raj Bajaj (George), James Quinn (Bill).

Directed by Douglas Mackinnon. Written by Jamie Mathieson.

‘Doctor Who’ airs on BBC One at 7:30pm and on BBC America on Saturdays at 9pm.