Guest Stars Anthony Ainley as The Master Keith Drinkel as Flight Engineer Scobie Richard Easton as Captain Stapley Michael Cashman as First Officer Bilton Judith Byfield as Angela Clifford Mykel Mills as Plasmaton (uncredited) Anthony Ainley as Kalid Peter Dahlsen as Horton Brian McDermott as Sheard Peter Cellier as Andrews John Flint as Captain Urquhart
