For the scene of Robin strapped to the clapper of Big Benjamin, the giant bell in the Wayne Memorial Clock Tower, art director Serge Krizman recalled building a belfry well set that was 40-feet high. "I couldn't find a bronze bell that was eight-feet high so it had to be made all out of plastics," said Krizman. Cinematographer Howie Schwartz had to resort to a 9.5mm wide-angle lens to get it all in.
It was often stated that Joan Crawford played The Printer's Devil in these episodes; however, this occurred due to a goof by one book which misspelled actor John Crawford's name, and many TV trivia and info books have since used this particular volume for reference without even questioning its error!
The late Roddy McDowall (The Bookworm) would become known for his role of Dr. Cornelius in Planet Of The Apes (20th Century-Fox, 1968). He later provided the voice of Jervis Tetch, The Mad Hatter, in several episodes of Batman: The Animated Series and The New Batman Adventures.