This episode eerily foreshadows the fact that Micky Dolenz would be the only remaining Monkee which, as of December 10, 2021, came to fruition with the death of Michael Nesmith.
The Count's full name is Count Sylvanius T. Batula.
The monsters spoofed are the Frankenstein Monster, Dracula, the Mummy, and the Wolf Man. At different points of the original Universal Monster franchise, all of these monsters were played by Lon Chaney Jr., who played Lenny in Monkees in a Ghost Town (1966).
Arlene Martel makes her second appearance as a comic villain-of-the-week in this series. The first was in The Spy Who Came in from the Cool (1966).
Mike Lane (Frankenstein), previously played Frankenstein's monster in Frankenstein 1970 (1958). He would go on to play him again as one of the heroes, named Frank N. Stein, in the Saturday morning series, Monster Squad (1976), starring a pre-Love Boat Fred Grandy.