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 David Webb as Leeson Helen Worth as Mary Ashe 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 Stanley McGeagh as Allen Ron Haymann as Alien Priest John Tordoff as Alec Leeson John Baker as Time Lord Roy Skelton as Norton John Ringham as Ashe Bernard Kay as Caldwell Morris Perry as Dent Nicholas Pennell as Winton
