RicoGregg said:Wayne Rogers left the show because according to Rogers, he and Alda were supposed to be equals in both billing and camera time. It didn't quite work out that way. Supposedly, they had the idea to have both Trapper John and Col. Blake in the same plane, but decided to find another way to write Trapper out. They decided one death was bad enough. Mike Farrell was subsequently hired with the very clear understanding that he was to be a second banana to Alda.
And yet, Rogers had a point: when you watch some of those early episodes, he really has little to do. Hawkeye will be yakking, mugging, tossing off one-liners, while Trapper gets to occasionally throw in a set-up line, or a one-line reaction. (I always thought that in the early 1st season "Yankee Doodle Doctor" episode, his playing the mute Harpo to Hawkeye's loquacious Groucho was rather prophetic!) The character of B.J. is, IMHO, far more balanced in scenes with Hawkeye -- there's more of a constant give-and-take between them that was almost never the case between Trapper and Hawkeye. B.J. also provided more of a contrast to Hawkeye, being a family man who was devastated when he allowed himself a one-time fling with another woman -- as opposed to Trapper, who broke his marriage vows at the drop of a hat. :