Karate champion Matt Logan is enlisted by the police to train officers in self-defense after narcotics agents are killed by an assailant using the martial arts.
- Year: 1979
- Country: United States of America
- Genre: Action, Adventure, Crime, Drama, Thriller
- Studio: American Cinema Productions
- Keyword: martial arts, showdown, police, gangster, karate, special unit, vigilante, serial killer, urban setting, murder mystery
- Director: Paul Aaron
- Cast: Chuck Norris, Jennifer O'Neill, Clu Gulager, Ron O'Neal, Bill Wallace, Eric Laneuville