Doctor Who newsletter
The Doctor delivered to your inbox
Be the first to know about the latest Doctor Who products and updates.
"You've no home planet, no influence, nothing. You're nothing but a pathetic bunch of tin soldiers skulking about the galaxy in an ancient spaceship"
The Doctor, Sarah and Harry hope to find the TARDIS waiting for them on Nerva Beacon, but instead find they are thousands of years earlier in time, on a space station in the grip of a deadly plague that has wiped out most of its crew. But the Doctor soon comes to suspect that the 'plague' is no natural illness – and that some of his oldest and most fearsome foes are behind it. And can the few humans on board be trusted?
The Doctor: Tom Baker
Sarah Jane Smith: Elisabeth Sladen
Harry Sullivan: Ian Marter
Commander Stevenson: Ronald Leigh-Hunt
Lester: William Marlowe
Kellman: Jeremy Wilkin
Tyrum: Kevin Stoney
Vorus: David Collings
Cyber-Leader: Christopher Robbie
First Cyberman: Melville Jones
Producer: Philip Hinchcliffe
Director: Michael Briant
Scriptwriter: Gerry Davis