William Hartnell

The Doctor

Jacqueline Hill

Barbara Wright

William Russell

Ian Chesterton

Maureen O'Brien

Vicki

Catherine Fleming

Animus (voice)

Roslyn de Winter

Vrestin

Arne Gordon

Hrostar

Arthur Blake

Hrhoonda

Jolyon Booth

Hlynia

Jocelyn Birdsall

Hlynia

Martin Jarvis

Hillo

Ian Thompson

Hetra

Barbara Joss

Nemini

Robert Jewell

Zarbi

Jack Pitt

Zarbi

Richard Martin