Including David Hedison (Kit Shaeffer), Keir Dullea (Dr Alex Noon), Lelia Goldoni (Louise Shaeffer), John Alderson (Al Baur), Bruce Boa (Detective Zakin), Peter Halliday (Supervisor), David Healy (Dr Peal), Peter King (Radar operator), Marika Rivera (Maria), Jeremy Wilkin (Casabond), and Marc Zuber (Radio operator).