The Undercover Man

Partial SPOILER as it follows the death of gang-bookkeeper Rocco, unveiled under-cover Treasury agent Frank (Glenn Ford, title character) with obsequious mob attorney O'Rourke (Barry Kelley) making an offer, then agonizing on the train, montage with Joseph H. Lewis directing Robert Osterloh, James Whitmore, Frank Tweddell, Esther Minciotti, in The Undercover Man, 1949.

Opening sequence from director Joseph H. Lewis' The Undercover Man, 1949, in which star Glenn Ford and his wife (Nina Foch) cross paths with a major suspect at a train station.

IRS Agent Frank Warren (Glenn Ford) meets an informant in a movie theater, to arrange another meeting, in director Joseph H. Lewis' The Undercover Man