Tom Conway

Tom Martin

Michael Balfour

Barney

Honor Blackman

Paula Grant / Paula Jackson

Brian Worth

Johnny Matlock

Bruce Seton

Webb

Freddie Mills

Pat

Alexander Gauge

MacAllister

John Horsley

Michael Matlock

Paddy Webster

Diane Grant

John Colicos

First Kidnapper

Larry Taylor

Second Kidnapper

Arthur Lowe

Mitchell

Frederick Schrecker

Professor Dohlmann

Marianne Walla

Miss Freda Dohlmann

Russell Westwood

Berlin Man

Henry Cass