M Squad is an American crime drama television series that ran from 1957 to 1960 on NBC. It was produced by Lee Marvin's Latimer Productions and Revue Studios. Its main sponsor was the Pall Mall cigarette brand; Lee Marvin, the program's star, appeared in its commercials during many episodes.
Set in Chicago, Illinois, the show starred Marvin as Detective Lieutenant Frank Ballinger, a member of "M Squad", a special unit of the Chicago Police, assisting other units in battling organized crime, corruption and violent crimes citywide. Paul Newlan co-starred as his boss, Captain Grey. Although Marvin had been appearing in feature films since 1951, it was this series that made him a star, and he later went on to an even bigger film career afterward. Nelson Case was the announcer.