The most iconic ending from any sitcom ever...at the very end of Newhart (his second sitcom) Bob wakes up next to his wife from the first sitcom (Suzanne Pleshette) and imagines the second show was a dream where he was an innkeeper in Vermont and met Larry, Daryl and his other brother Darryl.
https://www.youtube.com/watch?v=ZgdUWXf8jJk
https://www.youtube.com/watch?v=XaEQRYeAF9w
A 3 minute video from the late show with Craig Ferguson.
I think in a Craig Ferguson interview, Newhart told the story of him doing a bit for a movie or something. The director said something like - “Okay - now can you do it without the stammering.”
“Well I could, but I won’t. This stammering has gotten me two vacation homes and a yacht!”