What is "t-men"

T-Men is a 1947 semidocumentary style film noir by director Anthony Mann and shot by noted noir cameraman John Alton. The production features Dennis O'Keefe, Mary Meade, Alfred Ryder, Wallace Ford, June Lockhart and Charles McGraw. A year later, director Mann used the film's male lead, Dennis O'Keefe, in Raw Deal.

The film was identified as a B movie when featured in the 1992 documentary, Visions Of Light: The Art Of Cinematography for its use of lighting and in the discussion about film noir.