Colony in Space, Part Four

Jon Pertwee The Third Doctor Katy Manning Jo Grant Nicholas Courtney Alistair Gordon Lethbridge-Stewart Roger Delgado The Master (1st) Richard Franklin Captain Mike Yates John Levene Sergeant Benton Peter Forbes-Robertson Time Lord John Scott Martin Robot Tony Caunter Morgan Roy Skelton Norton SM Stanley McGeagh Allen JH John Herrington Holden Helen Worth Mary Ashe John Ringham Ashe JB John Baker Time Lord JT John Tordoff Alec Leeson RH Ron Haymann Alien Priest DW David Webb Leeson Pat Gorman Colonist Pat Gorman Long Pat Gorman Primitive and Voice NA Norman Atkyns Guardian BK Bernard Kay Caldwell SG Sheila Grant Jane Leeson JL John Line Martin MW Mitzi Webster Mrs. Martin Morris Perry Dent GL Graham Leaman Time Lord NP Nicholas Pennell Winton