Reel Cowboys of the Santa Susanas -- Howard Duff

Howard Duff (1913 - 1990) was an American actor of film, television, stage, and radio. He was probably best known for his role as a detective on the "Felony Squad" television series.

Calamity Jane and Sam Bass (1949) starring Yvonne De Carlo, Howard Duff and Dorothy Hart (Iverson Ranch) Universal

Blackjack Ketchum, Desperado (1956) starring Howard Duff, Victor Jory and Margaret Field (Iverson Ranch) Columbia

Sierra Stranger (1957) starring Howard Duff, Gloria McGehee and Dick Foran (Bell Ranch) Columbia

"Bonanza" (TV Series) episode 

"Enter Mark Twain" (1959) as Samuel Clemens / Mark Twain

"The Virginian" (TV Series) episodes: 

"The Town Killer" (1971) as Stuart Masters

"A Distant Fury" (1963) as Ed Frazer