Kansas City Confidential is a 1952 film noir crime film directed by Phil Karlson and starring John Payne, Coleen Gray, Preston Foster, Neville Brand, Lee Van Cleef and Jack Elam. The film was released in the United Kingdom as The Secret Four. Karlson and Payne teamed up a year later for 99 River Street, another noir, followed by a 1955 color film noir, Hell's Island.