Spearhead from Space, Part One

Jon Pertwee The Third Doctor Caroline John Elizabeth "Liz" Shaw Nicholas Courtney Alistair Gordon Lethbridge-Stewart John Levene Sergeant Benton BB Betty Bowden Meg Hugh Burden Channing Prentis Hancock 2nd Reporter DS Derek Smee Ransome EB Edmund Bailey Attendant TS Tessa Shaw UNIT Officer Ellis Jones Technician CC Clifford Cox Sergeant HD Hamilton Dyce Major General Scobie AW Antony Webb Dr. Henderson HM Henry McCarthy Dr. Beavis GL George Lee Corporal Forbes HD Helen Dorward Nurse AM Allan Mitchell Wagstaffe Talfryn Thomas Mullins NW Neil Wilson Seeley John Woodnutt Hibbert JB John Breslin Captain Munro