Bernard Horsfall Taron Actor Jon Pertwee Dr. Who Actor Jerome Willis Stevens Actor Vera Fusek President of Earth Actor Nicholas Courtney Brigadier Lethbridge-Stewart Actor Jane How Rebec Actor Prentis Hancock Vaber Actor Michael Hawkins General Williams Actor Katy Manning Jo Grant Actor Stewart Bevan Clifford Jones Actor Tim Preece Codal Actor Jenny McCracken Claire Daly Guest Star John Levene Sergeant Benton Actor Roy Skelton Wester Actor Stephen Thorne Omega Actor Michael Wisher Kalik Actor Mitzi McKenzie Nancy Actor John Scott Martin Dalek Actor Cy Town Dalek Actor Murphy Grumbar Dalek Actor Michael E. Briant Director Paul Bernard Director David Maloney Director Barry Letts Director Lennie Mayne Director Robert Sloman Writer Malcolm Hulke Writer Terry Nation Writer Bob Baker Writer Robert Holmes Writer Dave Martin Writer