Burt Ward - who'd finalized a divorce with his first wife several weeks earlier - was absolutely smitten with Kathy Kersh ("Cornelia"), whom he met for the first time on the set. Within a month of this filming, Kathy became Burt's second wife.
Window cameo: Howard Duff as Sgt. Sam Stone from the television show The Felony Squad
Batman (Adam West) states that before becoming a criminal, The Joker (Cesar Romero) used to be a professional hypnotist.
Bruce and Dick attempt to watch The Green Hornet television show, which was produced by the same people who did the Batman show.
Louis Quinn, who plays a henchman in this episode and the one that follows, had been a regular on 77 Sunset Strip (1958). Both series were produced by Howie Horwitz.