Ronald Earle Glass was an American actor. He was known for his roles as literary Det. Ron Harris in the television sitcom Barney Miller (1975–1982), and as the spiritual shepherd, Shepherd Book, in the science fiction series Firefly (2002) and its sequel film Serenity (2005).

Barney Miller is an American sitcom television series set in a New York City Police Department police station on East 6th St in Greenwich Village. The series was broadcast on ABC Network from January 23, 1975, to May 20, 1982. It was created by Danny Arnold and Theodore J. Flicker. Noam Pitlik directed the majority of the episodes. It spawned a spin-off series, Fish, that ran from February 5, 1977, to May 18, 1978, focusing on the character Philip K. Fish.