William Hartnell as Dr. Who

William Russell as Ian Chesterton

Jacqueline Hill as Barbara Wright

Carole Ann Ford as Susan Foreman

Derek Newark as Za

Alethea Charlton as Hur

Eileen Way as Old Mother

Jeremy Young as Kal

Howard Lang as Horg

Reg Cranfield as Policeman (uncredited)

Francesca Bertorelli as Schoolgirl (uncredited)

Carole Clarke as Schoolgirl (uncredited)

Heather Lyons as Schoolgirl (uncredited)

Mavis Ranson as Schoolgirl (uncredited)

Cedric Schoeman as Schoolboy (uncredited)

Brian Thomas as Schoolboy (uncredited)

Richard Wilson as Schoolboy (uncredited)

Leslie Bates as Tribesman (uncredited)

Al Davis as Tribesman (uncredited)

Billie Davis as Tribesman (uncredited)

Roy Denton as Tribesman (uncredited)

Bob Haddow as Tribesman (uncredited)

Bill Nichols as Tribesman (uncredited)

Frank Wheatley as Tribesman (uncredited)

Elizabeth Body as Tribeswoman (uncredited)

Jean Denyer as Tribeswoman (uncredited)

Veronica Dyson as Tribeswoman (uncredited)

Diane Gay as Tribeswoman (uncredited)

Brenda Proctor as Tribeswoman (uncredited)

Lyn Turner as Tribeswoman (uncredited)

Doreen Ubells as Tribeswoman (uncredited)

Antonia Moss as Child (uncredited)

Julie Moss as Child (uncredited)

David Rosen as Child (uncredited)

Trevor Thomas as Child (uncredited)