Cowboy G-Men - Season 1 - Episode 33 - Sidewinder | Russell Hayden, Jackie Coogan

The Scourge of the Southwest is an especially ruthless and devious killer dubbed the Sidewinder. When a hapless Cavalryman escorting the criminal falls victim to his tricks, Pat and Sonny set out to track him down and bring him in.
Russell Hayden and former child actor Jackie Coogan (who would later perform as Uncle Fester on The Addams Family) stars as Pat Gallagher and Stoney Crockett, respectively, a pair of government agents operating in the American West in the 1870s.[1] Television actor Phil Arnold portrayed Zerbo, a sometimes associate of Gallagher and Crockett. Gallagher typically was undercover as a ranch hand, while Crockett took the role of a wrangler.

Director: Don McDougall (as Donald McDougall)
Writers: Buckley Angell (screenplay), Henry B. Donovan (based on an original story by)
Stars: Russell Hayden, Jackie Coogan, Phil Arnold

Cast
Russell Hayden ... Pat Gallagher
Jackie Coogan ... Stoney Crockett
Phil Arnold ... Zerbo
James Seay ... Mort Boyd
Charlita ... Angela Monroe
Gregg Barton ... Judge Garrison
Harry Hickox ... Marshal Bender
John Cason ... Henchman