William Hartnell as The Doctor

Carole Ann Ford as Susan Foreman

Jacqueline Hill as Barbara Wright

William Russell as Ian Chesterton

Bernard Kay as Carl Tyler

Peter Fraser as David Campbell

Alan Judd as Dortmun

Ann Davies as Jenny

Michael Goldie as Craddock

Michael Davis as Thomson

Richard McNeff as Baker

Graham Rigby as Larry Madison

Nicholas Smith as Wells

Patrick O'Connell as Ashton

Jean Conroy as Woman in the Wood

Meriel Hobson as Woman in the Wood

Peter Hawkins as Dalek (voice)

David Graham as Dalek (voice)

Peter Badger as Roboman

Martyn Huntley as Roboman

Nick Evans as Dalek / Slyther

Robert Jewell as Dalek

Kevin Manser as Dalek

Peter Murphy as Dalek

Gerald Taylor as Dalek