In the music romp for "What Am I Doin' Hangin' Round", Davy Jones is seen holding a copy of The Beatles' "Sgt. Pepper's Lonely Hearts Club Band" album, released June 1, 1967, shortly before the filming of this episode.
Micky Dolenz misquoted a line from The Treasure of the Sierra Madre (1948). "Badges? We don't need no stinking badges". The misquote has become much more common than the correct line: "I don't have to show you any stinking badges,......"
Micky Dolenz hair is naturally curly, during season 1, his hair was chemically treated to straighten it out. Season 2 brought an end to that happening.
Season 2 has a new ending theme song for the episodes.
The sheepskin vest worn by El DIablo (Peter Whitney) was previously seen in The Spy Who Came in from the Cool (1966), worn by Boris (Jacques Aubuchon) while posing as protest singer "The Bear" and in Son of a Gypsy (1966), worn by Marco the gypsy (Vincent Beck); It will be seen again in The Devil and Peter Tork (1968), worn by Atilla The Hun (Lee Kolima) and in the Monkees' feature film Head (1968), worn by Lord High 'n Low (Timothy Carey).