Dial 999

Gene Nelson

Greg Carradine

Mona Freeman

Terry Moffat Carradine

John Bentley

Det. Sgt. Seagrave

Michael Goodliffe

John Moffat

Michael Golden

The Chief Inspector

Paula Byrne

Vera Bellamy

Cyril Chamberlain

Anderson (murder victim)

Charles Victor

Tom Smithers

Kay Callard

Blonde at bar

Sydney Tafler

Alf Cressett

Charles Mortimer

Mr. Harding (publisher)