T-Man was a radio program aired in 1950 and 1956. The show’s first season featured Dennis O’Keefe, who played the role
of a treasury agent going after counterfeiters. He also starred in the film version of T-Man, which was released years before the radio adaptation started.
On the other hand, in the 1956 radio adaptation, the show focused on the Jack Ketch, a tax agent played by Gordon Glenwright.