I almost never give an episode of anything ten stars. In fact, this might be the first one ever. But it deserves it. It's a national treasure.
As others have mentioned, this is an absolutely brilliant send up of "Gunsmoke" - particularly the black-and-white show of the late 50s, of which I'm a big fan. You'll find someone parodying practically every character of that show, but my favorite is the guy who plays the Chester character - Deputy Clyde Diefendorfer. He even sounds like Dennis Weaver, and has his mannerisms down pat. He has a limp like Chester . . . But it's because someone stepped on his foot that morning. LOL. And like Chester, he's obsessed with coffee and always calls the Marshall "Mr. Dooley."
Like another reviewer, I spotted the convertible WAAAAAAAY up the street in the background, a little over halfway through the episode. Had to be intentional because there are so many other little gems stuck in this episode. One of my favorites is a scene between "Mort" and the Doc where they discuss strangers who have passed through town, and Mort mentions this strange gunfighter who was handing out business cards . . . A reference to "Have Gun, Will Travel."
The plot? Who cares. It's really just an excuse to show us the Maverick version of Gunsmoke.
I give this epsisode my highest recommendation, especially if you like Maverick and/or the Gunsmoke of the 1950s.