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