MASH's aptly titled spin-off series, AfterMASH, featured several familiar faces from the beloved 4077th mobile army surgical unit in Korea. Much like other hit sitcoms, CBS would have wanted to keep MASH on the air for as long as possible thanks to its popularity. That being said, more than a decade of the medical comedy-drama was more than enough for its true lead star, Alan Alda, who played the competent but wildly chaotic, Captain Benjamin "Hawkeye" Pierce. Not everyone from the cast, however, shared the actor's decision to retire their respective MASH characters, giving the network the chance to continue the franchise via an expansion.
https://screenrant.com/mash-sequel-show-actors-spinoff-aftermash/