Guest Stars Peter Greene as Cyberman John Maxim as Cyberman Derek Calder as Scientist Alan Wells as Scientist Robin Scott as Scientist Ron Pinnell as Scientist Victor Pemberton as Scientist Leon Maybank as Scientist Arnold Chazen as Scientist Barry Ashton as Scientist Edward Phillips as Scientist John Rolfe as Sam Patrick Barr as Hobson André Maranne as Benoit Michael Wolf as Nils Alan Rowe voices Space Control Denis McCarthy voices Controller Rinberg
