O'Hara, U.S. Treasury(1971)

O'Hara, U.S. Treasury is an American crime drama that aired on CBS during the 1971–72 season, starring David Janssen as a federal agent investigating financial crimes and Treasury violations. Created by Jack Webb and James E. Moser, the series was produced by Mark VII Limited for Universal Television with full cooperation from the U.S. Department of the Treasury, lending it authentic procedural detail. Leonard B. Kaufman served as producer. The show follows O'Hara as he navigates cases involving counterfeiting, smuggling, and fraud, bringing a gritty realism to the Treasury agent's work. Janssen's portrayal captures the methodical nature of federal investigation during an era when crime dramas dominated primetime television.