Guest Stars Peter Greene as Cyberman Reg Whitehead as Cyberman Peter Hawkins voices Cyberman John Maxim as Cyberman Sonnie Willis as Cyberman Keith Goodman as Cyberman Barry Ashton as Scientist Victor Pemberton as Scientist Robin Scott as Scientist Derek Calder as Scientist Alan Wells as Scientist John Rolfe as Sam André Maranne as Benoit Patrick Barr as Hobson Michael Wolf as Nils Alan Rowe as Dr. Evans
