It came up once or twice in the first season, like several other elements from the movie that were eventually dropped (like Spearchucker).
I feel bad for being relieved upon reading the full thread title - seeing just ‘RIP Father Mulcahy’, I had a moment of worry that Rene Auberjonois had passed - but this is quite a loss.
It was only upon reading of Mulcahy’s death that I learned that that role had been played in the movie by the changeling from Deep Space Nine. Small world.
Worth noting that one other person has played Father Mulcahy (George Morgan in the first broadcast episode, in which the Father wins the raffle, with the prize being a weekend in Seoul with one of the nurses).
Over the Christmas holiday I was watching a few episodes of a sitcom binge that the station Decades were running. They were airing a run of Gomer Pyle, USMC. I hadn’t seen that show in years and forgot that William Christopher was an occasional supporting character recruit on that series.
In later years, the show had a research staff who would phone Korean War vets around the country and ask if they had any memorable stories that could be used on MASH***.