M.A.S.H. rule of thumb:
The early episodes with Col. Blake (McLean Stevenson) as the base commander are good. But Stevenson left the show after the third season, and everything went downhill from there.
The show lost a lot of its irreverent wit, and became preachy. I believe that was because Alda was given more and more control over the show as time went on.
Thanks Leaning Right.
Not having followed the show, I wouldn’t have picked up on that.