Synopsis:

On a remote Army outpost, a fearsome alien warlord – the Fisher King – sets in motion a twisted plan to ensure his own survival. The ripples will be felt around the universe. Is this chain of events inevitable? And can the Doctor do the unthinkable?

“Before the Flood” is written by Toby Whithouse, directed by Daniel O’Hara and produced by Derek Ritchie. Guests stars include Paul Kaye, Colin McFarlane and Sophie Stone.

Cast: Peter Capaldi and Jenna Coleman.

Guest Stars: Zaqi Ismail, Morven Christie, Arsher Ali, Steven Robertson, Neil Fingleton and Peter Serafinowicz.

‘Doctor Who’ Series 9 airs Saturdays on BBC America at 9pm.