Patrick Troughton

as Dr. Who

Michael Craze

as Ben Jackson

Anneke Wills

as Polly

Robert James

as Lesterson

Nicholas Hawtrey

as Deputy Governor Quinn

Martin King

as The Examiner

Bernard Archard

as Head of Security Bragen

Pamela Ann Davy

as Janley

Peter Bathurst

as Governor Hensell

Edward Kelsey

as Resno

Richard Kane

as Valmar

Peter Hawkins

as Daleks (voice)

William Hartnell

as The Doctor in the mirror (uncredited)