Episódio 14

Nicholas Courtney Lethbridge-Stewart

Sheila Dunn Telephone Operator (voice)

Edward Dentith Major-General Rutlidge

Edward Burnham Professor Watkins

James Thornhill Sergeant Walters

Robert Sidaway Captain Jimmy Turner

Sally Faulkner Isobel Watkins

Pat Gorman Cyberman

Peter Halliday Packer

Kevin Stoney Tobias Vaughn