Captain B.J. Hunnicutt (played by Mike Farrell) is a fictional character in the TV show M*A*S*H, which ran from 1972-1983 on CBS. Hunnicutt resided in Mill Valley, California before he was recruited to join the US Army to fight in the War. He is a third generation doctor in his family, educated at Stanford University and was a member of the Tau Phi Epsilon fraternity. B.J. is married to Peg Hadden (who writes scores of letters to him while he is in Korea). The couple has a daughter, named Erin. The series is never consistent on Erin's age; at times she is either an infant who was born after B.J. was drafted or about five or six when her father goes to Korea. His father-in-law Floyd Hadden fought the Germans in World War I and is a farmer in Quapaw, Oklahoma.