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