Before he was Cosmo Kramer on Seinfeld, Michael Richards guest starred in one of my favorite It's a Living episodes as a terrorist. It airs this weekend Sunday at 4PM on Antenna TV.

I half jokingly consider that episode ("Desperate Hours" (https://www.imdb.com/title/tt0613039/reference/)) as being a sitcom precursor to Die Hard, which also involved terrorists taking over a high-rise building in Los Angeles. There's in that episode, even a character named Mr. Gruber like the villain (https://en.wikipedia.org/wiki/Hans_Gruber_(character)) in Die Hard.