Lawman (1958)

Season 1: Episode 7

Fallon, a ruthless bounty hunter, brings in a body of a wanted man and collects the reward from Dan, who knew him elsewhere and doesn't like him. After being told to leave town, Fallon shows Dan and Johnny a picture of the next man on his 'hit list'. Johnny knows him and tries to protect him from the killer, but is injured in the process. Finally, Dan must step in to stop another killing by Fallon.