Emil Sitka's final film appearance with The Three Stooges. A regular in their films for decades, Sitka would actually officially become a Stooge in the early 1970s after Larry Fine was forced to retire, but he never made a movie in this role.
Norman Maurer is the son-in-law of Moe Howard. Jeffrey Scott, who plays "Kid," is Maurer's son and Moe's grandson.
The actors who portray the gunslingers were hosts of The Three Stooges television programs in the 1960s. One of them, Don Lamond, was Larry Fine's son-in-law.
The title "The Outlaws is Coming!" is a joke referring to 'Alfred Hitchock (I)''s The Birds that was promoted with blurb "The Birds is Coming!"
This was The Three Stooges' final completed film as a group. They made one more film together, Kook's Tour, but the film sat unfinished and unreleased for years due to Larry Fine suffering a stroke before the movie was complete.