Tim Donnelly, the actor who is best known for playing fireman Chet Kelly on the 1970s TV series “Emergency!,” has died. He was 77. The news was first shared by the Los Angeles County Fire Museum.

Tim Donnelly, who portrayed the fun-loving firefighter Chet Kelly on all six seasons of the 1970s NBC series Emergency!, has died.He was 77. Donnelly died Friday at his home in Santa Fe, New ...