Sarah attempts to find a way off the spaceship while the Doctor tries to track down the source of the time displacements.
Quest roles:
Richard Franklin(Mike Yates), Nicholas Courtney(Brig. Lethbridge-Stewart), Martin Jarvis(Governor), Carmen Silvera(Queen of Hearts), Noel Johnson(King Thous), John Levene(Sergeant Benton), John Bennett(Li H'sen Chang), Terence Wilton(Mark), Brian Badcoe(Adam), Peter Miles(Dr. Lawrence)