Here we go again... Someone with a bad past -- or simply a bad image -- wants to "do right", but is beset by forces trying to steer him in the wrong direction. (Steer? Get it?) Sometimes they even try to buffalo him into Doing Something Wrong. (Buffalo? Get it?) It's as predictable as Kraft Singles.
"Gunsmoke" must have had a mimeographed boilerplate script for this sort of story, where the writer simply filled in the blanks. It probably took no more than a long afternoon to create a "new" script. This one doesn't seem to have been edited carefully, because there were no "penny" novels.
The only original thing is the song about her infamous husband Mrs Coulter sings in a saloon. The melody sounds only sort-of 19th-century. (This is a common problem in TV Westerns. * You'd think a professional composer would have no trouble parodying the melodies and harmonies of 19th-century popular songs. But I've never heard one that got it right.)
This is an episode you can safely pass by (unless you're hot for Jan-Michael Vincent, which I'm not).
PS: I'm bothered that the reviewer who has likely reviewed more "Gunsmoke" episodes than anyone else thinks that "action" is the most-important element of a Western. He's sometimes surprised that a story with little or no action can be engaging.
* Also movie Westerns. Take "Destry Rides Again". Though the Loesser/Hollander "See What the Boys in the Back Room Will Have" captures a 19th-century musical-hall quality, "You've Got That Look" sounds thoroughly modern.