Mark Harmon, born in 1951, has built a remarkably steady and respected career in American television, evolving from a college football standout to one of the medium’s most dependable leading men. A former UCLA quarterback, Harmon transitioned to acting in the 1970s, appearing in shows like *St. Elsewhere* and *Chicago Hope*, where his dramatic range and subtle intensity began to draw notice. His portrayal of Dr. Bobby Caldwell on *St. Elsewhere* helped cement him as a household name, combining c