Guest Stars Peter Forbes-Robertson as Time Lord John Scott Martin as Robot Tony Caunter as Morgan Morris Perry as Dent John Ringham as Ashe Helen Worth as Mary Ashe David Webb as Leeson Pat Gorman as Primitive and Voice Pat Gorman as Long Pat Gorman as Colonist Graham Leaman as Time Lord John Line as Martin John Herrington as Holden Bernard Kay as Caldwell Stanley McGeagh as Allen Ron Haymann as Alien Priest Norman Atkyns as Guardian John Tordoff as Alec Leeson Sheila Grant as Jane Leeson John Baker as Time Lord Mitzi Webster as Mrs. Martin Roy Skelton as Norton
