John Bentley
— Det. Insp. Dan Barker
Phyllis Kirk
— Judy Roberts
Leonard White
— Det. Sgt. Mack McLeod
Glyn Houston
— Charlie Williamson
Patrick Jordan
— Albert Fisher, called both "Al" and "Bert"
Harold Ayer
— Steward Alfred Gordon, also called "Al"
David Hurst
— Paddy Maclure
Charles Lloyd Pack
— John Hendrick
Robert Ayres
— Ship's Captain Watford
Ewan Roberts
— Customs Chief J. S. Blake
Michael Balfour
— Adams