Government agent Dick Barton battles a ring of Nazi spies who are planning to poison the entire London water supply.
| Writing | Alan Stranks | Story |
| Writing | Alfred J. Goulding | Writer |
| Directing | Alfred J. Goulding | Director |
| Art | James Marchant | Art Direction |
| Camera | Stanley Clinton | Director of Photography |
| Production | Henry Halstead | Producer |
| Editing | Etta Simpson | Editor |
| Sound | John Bath | Music |
| Production | Edgar Blatt | Casting |
| Directing | Eric Veendam | Assistant Director |
| Sound | John Bath | Music Director |
