I almost forgot, but M*A*S*H had three spin-offs, one of which was only mildly successful, the other two not so much.
- TRAPPER JOHN, MD: I think this actually came about while M*A*S*H itself was still running, but at any rate, it was basically about Trapper returning to his own practice in Boston after the war; Wayne Rogers didn't reprise the role, but rather, Pernell Roberts played the aging Trapper. Supposedly, however, this was actually supposed to be a spin-off of the movie, not the series.
- AfterMASH: This was a weird concept, but CBS clearly didn't want M*A*S*H to go away just yet, so they created this spin-off in which Potter, Klinger, and Mulcahy ended up working together at the same stateside hospital in Missouri; it was a miserable flop, and even Jamie Farr said it wasn't a pleasant experience working on it. It only lasted two seasons, the second of which never even finished airing because of poor ratings.
- W*A*L*T*E*R: An attempt to give Radar his own spin-off, but what happened was his mother died, he failed as a farmer, so he sold the family farm, moved to St. Louis with his cousin, and the two of them joined the police force. Only the pilot episode was filmed, and it was such a poor pilot, the series was never greenlit.