The BBC have released the synopsis for Before the Flood. It will air on October 10th at 9PM on BBC America.
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 airs Oct 10 on BBC One (time TBC)