I describe the episode, and you name the tv show

The only time I saw William Holden and John Wayne in the same movie was in “The Horse Soldiers”, but that was a movie, not a TV episode. But that was a movie, not an episode of a TV show. If anyone wants to continue this game, should the rules be broadened?

See 0:52 in this clip

Sorry for making my clue too obscure

I Love Lucy. He was also on The Lucy Show, but even though Vivian Vance was also on that show, her character was named Vivian.

A government agent is assigned to stop “Mr. Big” of a criminal organization, and discovers that “Mr. Big” is only 4 feet tall.

That’s Get Smart. Mr. Big, aka Michael Dunn, deserved better.

Talented but arrogant surgeon has an unfortunate encounter with a helicopter on Thanksgiving.

ER - Rocket Romano has a bad day

Baltimore concert goes bad for our characters - but the return home is worse