Mike Farrell (Captain B.J. Hunnicutt) joined the cast of "M*A*S*H" in Season 4 after Wayne Rogers left the show. Farrell was cast to play Hawkeye's new sidekick, B.J. Hunnicutt & stayed through the end of the series. Farrell has also spent a great deal of his time since "M*A*S*H" pursuing his off-camera passion -- political activism. He is currently president of Death Penalty Focus, a group committed to abolishing capital punishment.