"Government agent Dick Barton battles a ring of Nazi spies who are planning to poison the entire London water supply."
Don Stannard
as Dick Barton
George Ford
as Snowey White
Jack Shaw
as Jock
Gillian Maude
as Jean
Geoffrey Wincott
as Dr. Casper
Farnham Baxter
as Roscoe
Morris Sweden
as Regan
Beatrice Kane
as Betsy Horrock
Arthur Bush
as Schüler
Ivor Danvers
as Snub
Ernest Borrow
as Gilpin
Colin Douglas
as Stark
Janice Lowthian
as Adele Reed
Alec Ross
as Tony Burton
Campbell Singer
as Sir George Cavendish
Peter Brace
as Henchman
Jim Brady
as Henchman in Fist Fight
Eddie Powell
Eric Veendam
Assistant Director
John Bath
Music Director
Music
Edgar Blatt
Casting
Alfred J. Goulding
Director
Alan Stranks
Story
Writer
Stanley Clinton
Director of Photography
Henry Halstead
Producer
Etta Simpson
Editor
James Marchant
Art Direction