Captured in a time corridor, the Doctor and his companions are forced to land on 20th century Earth, diverted by the Doctor's oldest enemy - the Daleks. It is here the true purpose of the time corridor becomes apparent: after ninety years of imprisonment, Davros, the ruthless creator of the Daleks, is to be liberated to assist in the resurrection of his army. Not even the Daleks foresee the poisonous threat of their creator. Indeed, who would suspect Davros of wanting to destroy his own Daleks - and why? Only the Doctor knows the truth. Will he descend to Davros' level of evil to stop him?
Peter Davison
as The Doctor
Janet Fielding
as Tegan Jovanka
Mark Strickson
as Vislor Turlough
Terry Molloy
as Davros
Maurice Colbourne
as Lytton
Rodney Bewes
as Stien
Rula Lenska
as Styles
Del Henney
as Colonel Archer
Chloe Ashcroft
as Professor Laird
Philip McGough
as Sergeant Calder
Jim Findley
as Mercer
Leslie Grantham
as Kiston
