Michael Joseph "Mike" Farrell, Jr. (b. February 6, 1939) is an American actor.
Farrell is best known for his role as Captain B.J. Hunnicutt on the television series M*A*S*H. Other appearances include Providence, Desperate Housewives, Law & Order: Special Victims Unit and The Red Road.
Farrell was also a producer of Patch Adams starring Robin Williams. He is an activist for various political causes.