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First season. The episode was called “The Coach’s Daughter” (written by Ken Estin and directed by James Burrows). From the title you can probably get the gist of what the show was about. The Coach’s somewhat plain daughter introduces her fiancé to her dad and the gang at Cheers and he’s a real boorish lout. (He sold flame retarded reversible suits and yet he wasn’t reputable.)
Sidenote: The actor who played him was Phillip Charles MacKenzie. For the first
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Late in the episode there’s a lovely scene where the Coach has a heart-to-heart with his daughter, Lisa in Sam’s office. It’s clear to everyone (but the Coach of course) that she’s marrying this clown, Roy out of insecurity not love. Lisa tells her dad that Roy thinks she’s beautiful. The Coach says, “You are beautiful. You look just like your mother.” It was meant to touch Lisa’s heart.
We were holding our breaths hoping it didn’t get a big gooey “Awwwwwwww!” Instead it got this thunderous laugh. Applause even. Everyone on the stage was stunned. We shot the scene again, thinking this time they’ll see it differently. Nope. Huge laugh the SECOND time.
Still, when we assembled the show we all felt it hurt the scene and ultimately the story. Kudos to the Charles Brothers for being willing to lift the episode’s biggest laugh to preserve the emotional core of the show.
Sometimes jokes can also sacrifice the integrity of your characters -- make them too stupid, too insensitive, etc. When that even becomes a borderline call my vote is to dump the joke. Same with jokes of questionable taste. Take the high road.
As hard as it is to write big jokes, it's always much harder to discard them. But the rewards are greater and you'll like yourself in the morning.