From the episode's Wikipedia page for Clyde Bruckman: "The titular character . . . was originally written with Bob Newhart in mind, but Peter Boyle was later cast" Boyle was perfection in the role, but man I can totally picture Bob Newhart doing that and it would've been amazing.
Small Potatoes is a good stand alone as well.
Bad Blood! I know you didn’t ask but that’s such a good one too.
He had just watched that one earlier this evening!
I’m going to rewatch the Bruckman one thinking of Newhart in the role with this new knowledge. That would’ve been a funny casting, but in a more frustrating way.
Peacock Brothers and the one with Peterman are also golden.
Boyle's more ascerbic. Newhart would have just been odd and remote.
It is a very Newhart character
I think I remember Boyle saying that he hated the episode, or maybe the show
“I can’t think of a more undignified one than autoerotic asphyxiation”
That episode and Young Frankenstein are my two favorite Peter Boyle performances.
I think the episodes of X-files that examine paranormal with a sense of humor are my favorite. The one with the shapeshifter who plays Mulder for a while is some excellent Duchovny work.
Of course, if you want to freak him out with some truly scary/horrific episodes you go with "Home", "Squeeze", and "Irresistible".