Tom Conway
Tom Martin
Acting
Michael Balfour
Barney
Acting
Honor Blackman
Paula Grant / Paula Jackson
Acting
Brian Worth
Johnny Matlock
Acting
Bruce Seton
Webb
Acting
Freddie Mills
Pat
Acting
Alexander Gauge
MacAllister
Acting
John Horsley
Michael Matlock
Acting
Paddy Webster
Diane Grant
Acting
John Colicos
First Kidnapper
Acting
Larry Taylor
Second Kidnapper
Acting
Arthur Lowe
Mitchell
Acting
Frederick Schrecker
Professor Dohlmann
Acting
Marianne Walla
Miss Freda Dohlmann
Acting
Russell Westwood
Berlin Man
Acting