Government agent Dick Barton battles a ring of Nazi spies who are planning to poison the entire London water supply.

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Main Cast: Don Stannard, George Ford, Jack Shaw, Gillian Maude, Geoffrey Wincott, Farnham Baxter, Morris Sweden, Beatrice Kane, Arthur Bush, Ivor Danvers

Director: Alfred J. Goulding

Writers: Alfred J. Goulding, Alan Stranks

Editor: Etta Simpson

Cinematographer: Stanley Clinton

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