It's a regular M*A*S*H-up as three characters from the early seasons team up to fight the three characters who were brought in to replace them. (With the first team, we're talking about the TV versions, not the original movie versions.)
Trapper John McIntyre (Wayne Rogers), Frank Burns (Larry Linville), Henry Blake (McLean Stevenson)
B.J. Hunnicutt (Mike Farrell), Charles Winchester (David Ogden "Dropped after the pilot of Charlie's Angels" Stiers), Sherman Potter (Harry Morgan).
Hawkeye was originally going to be the referee, but both teams got so tired of his preaching about the evils of violence that they buried him under a pile of rocks that spelled out "GOODBYE." Now there is no referee and no rules, just two teams of three and a desperate desire to show who's really in charge at the 4077th.
Which set of sitcom surgeons will slaughter the second set?