Guest Stars Bill McGuirk as Policeman Frank Mills as Radio Telescope Director Terry Walsh as Auton Policeman Harry Towb as McDermott David Garth as Time Lord Norman Stanley as Telephone Mechanic Roy Stewart as Strong Man John Baskcomb as Rossini Christopher Burgess as Professor Philips Barbara Leake as Mrs. Farrel Andrew Staines as Goodge Stephen Jack as Farrel Senior Dermot Tuohy as Brownrose Michael Wisher as Rex Farrel Dave Carter as Museum Attendant Pat Gorman as Auton Leader Hayden Jones as Auton Voice
