King of the Underworld
- Joer: 1952
- Land: United Kingdom
- Genre: Drama, Crime
- Studio: Gilbert Church Productions
- Schlësselwuert: blackmail, murder, secret formula
- Direkter: Victor M. Gover
- Besetzung: Tod Slaughter, Patrick Barr, Tucker McGuire, Ingeborg von Kusserow, Frank Hawkins, Leonard Sharp