It turns out producers had a different song entirely in mind, but it was being used by another TV show and they couldn't get it. So they turned to a tune called "Where Everybody Knows Your Name," co-written by Gary Portnoy, a composer most of us had never heard of.
His original song contained words that didn't end up on TV, including a reference to the Boston Red Sox, the city where the show took place.
Here's the story behind that famous tune, back when TV shows still had theme songs that you heard every week.
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Here's the song producers originally wanted. It was called "People Like Us," and I can only say thank God it was being used by someone else, a show you never watched called "Preppies". The one they went with was far, far, better.