Michael Joseph Farrell Jr. (born February 6, 1939) is an American actor, best known for his role as Captain B.J. Hunnicutt on the television series M*A*S*H (1975–83). Farrell was a producer of Patch Adams (1998) starring Robin Williams, and starred in the television series Providence (1999–2002). He is also an activist and public speaker for various political causes.