Flatline Official Synopsis

The BBC have released the official story synopsis for Flatline, the ninth episode of Series 8, written by Jamie Mathieson.

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.

It premieres Saturday 18 October at 8.30pm on BBC1.