- HD 1080
- Runtime: 85m.
- Status: Released
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- Languages: en
- Country: United States of America
- Director: Joseph H. Lewis
- Stars: Glenn Ford, Nina Foch, James Whitmore, Barry Kelley, Frank Tweddell
- keywords: film noir, treasury department
- Production_studio: Columbia Pictures
- Slogan: TOLD WITH THE SNARL OF A MACHINE GUN!
- The The Undercover Man is featured in the top rankings of 1949
- #81 in Top Drama Movies of 1949
- #34 in Top Crime Movies of 1949
Frank Warren is a treasury agent assigned to put an end to the activities of a powerful mob crime boss. Frank works undercover, posing as a criminal to seek information, but is frustrated when all he finds are terrified witnesses and corrupt police officers.