Gunsmoke
"Around Dodge City and the in territory on west, there's just one way to handle the killers and the spoilers. And that's with the U.S. Marshal and the smell of... Gunsmoke."
Starring William Conrad as Marshal Matt Dillon.
You can find more episodes in the Ear Benders section.
Here is a sample of the online episodes currently available at The Old Time Radio Fan:
Reed Survives
1955-06-18 (6.75 MB) [29:30]
Brush At Elkader
1955-10-23 (5.53 MB) [24:09]