Harry Morgan (born April 10, 1915) is an American actor. Morgan is perhaps best known as Colonel Sherman T. Potter on M*A*S*H (1975-83), Pete Porter on both Pete and Gladys (1960-62) and December Bride (1954-1959), Detective Bill Gannon on Dragnet (1967-70), and Amos Coogan on Hec Ramsey (1972-74). He has appeared in more than 100 films. Early life and career Morgan was born Harry Bratsberg in Detroit, Michigan of Norwegian heritage. He was raised in Muskegon, Michigan, and graduated from Muskegon High School in 1933, where he achieved distinction as a statewide debating champion. He originally aspired to a law degree, but began acting while a junior at the University of Chicago in 1935. Morgan began acting on stage under his birth name, joining the Group Theatre in New York City in 1937, and appearing in the original production of the Clifford Odets play Golden Boy, followed by a host of successful Broadway roles alongside such other Group members as Lee J. Cobb, Elia Kazan, Sanford Meisner, and Karl Malden. Screen debut Morgan made his screen debut (originally using the name Henry Morgan) in the 1942 movie To the Shores of Tripoli. His screen name later would become Henry Harry Morgan and eventually Harry Morgan, to avoid confusion with the then-popular humorist of the same name. Harry Morgan can be seen as a very young man in the 1941 movie Sun Valley Serenade.