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 Colonist Pat Gorman as Long Helen Worth as Mary Ashe Stanley McGeagh as Allen Graham Leaman as Time Lord Mitzi Webster as Mrs. Martin John Line as Martin Sheila Grant as Jane Leeson John Herrington as Holden Norman Atkyns as Guardian Morris Perry as Dent Ron Haymann as Alien Priest John Tordoff as Alec Leeson John Baker as Time Lord Roy Skelton as Norton John Ringham as Ashe David Webb as Leeson Bernard Kay as Caldwell Nicholas Pennell as Winton
