Episódio 16

Nicholas Courtney Lethbridge-Stewart

Peter Hawkins Dalek (voice)

Stacy Davies Private Perkins

Ian Fairbairn Mark Gregory

Derek Chafer Cyberman

Terence Denville Cyberman

Edward Burnham Professor Watkins

James Thornhill Sergeant Walters

Sally Faulkner Isobel Watkins

Pat Gorman Cyberman