River Beat

John Bentley

Det. Insp. Dan Barker

Phyllis Kirk

Judy Roberts

Glyn Houston

Charlie Williamson

Patrick Jordan

Albert Fisher, called both "Al" and "Bert"

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

Leonard White

Det. Sgt. Mack McLeod

Harold Ayer

Steward Alfred Gordon, also called "Al"