John Bentley (Det. Insp. Dan Barker), Phyllis Kirk (Judy Roberts), Leonard White (Det. Sgt. Mack McLeod), Glyn Houston (Charlie Williamson), Patrick Jordan (Bert Fisher), Robert Ayres (Watford: ship's captain), Ewan Roberts (Customs Insp. J.S. Blake), David Hurst (Paddy McClure), Charles Lloyd Pack (John Hendrick), Isabel George (Anna: gang moll), Margaret Anderson (Nell: Charlie's girl), Harold Ayer (Joseph Benson, alias Alfred Gordon), Tony Hilton (Harry: bartender), Colin Douglas (Harbor Patrol superintendant), Bill Nagy (Eddie: deck sailor), Michael Browning (Det. Perry), Michael Balfour (Adams: crewman), and Peter Collingwood (Coroner).
