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
