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