Not only was this based on the TV series The Man From U.N.C.L.E., but Steven Geray, who portrayed Mr Gerard, was in an episode of that series earlier that year.
A close look at the toys found in Richie's bedroom includes two Addams Family hand puppets (Morticia and Uncle Fester) mounted on the far wall. Also, there are numerous unpainted Aurora monster models on display in various locations. Among the models, which were released during the classic monster revival of the 1960s: Frankenstein, King Kong, Bride of Frankenstein, Wolf Man, The Mummy, Dracula, and the Chamber of Horrors Guillotine. In the final scene, Laura Petrie picks up and moves two of the models across the room.
Music from "The Andy Griffith Show" was used for the "stakeout room" scenes, as both shows had been scored by Earle Hagen.
Made in 1966 at the height of the secret agent craze, not only is the title a shoutout to The Man From UNCLE, but so too is the casting of well-known Black standup comic Godfrey Cambridge as the agent a shoutout to the groundbreaking I Spy which starred comedian Bill Cosby.