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