Government agent Dick Barton battles a ring of Nazi spies who are planning to poison the entire London water supply.
Length 70 minutes
Don Stannard | George Ford | Jack Shaw | Gillian Maude | Geoffrey Wincott | Farnham Baxter | Morris Sweden | Beatrice Kane | Arthur Bush | Ivor Danvers | Ernest Borrow | Colin Douglas | Janice Lowthian | Alec Ross | Campbell Singer | Peter Brace | Jim O'Brady | Eddie Powell