Terry Moore as Alison Ford

Robert Beatty as Tim Forrester

William Sylvester as Dave Forrester

Josephine Griffin as Jill Stewart

Geoffrey Keen as Inspector Colby

Allan Cuthbertson as Henry Carmichael

Henry Oscar as John Smith

William Lucas as Reg Dorking

Terence Alexander as Fenby

Bruno Barnabe as Italian Detective

Eric Corrie as Pilot

Jack Howarth as Hotel Porter

Stuart Saunders as Sgt. Haines

Marianne Stone as Receptionist

Frank Thornton as Police Photographer

Raymond Francis as Police Inspector - Interpol Division

Sam Kydd as Bill, the Telephone Engineer

Robert Raglan as (uncredited)

Ian Wilson as Dorking's Customer (uncredited)