Rita Moreno first said "Hey, you guys!" on episode 19 (season 1, show 19), which became the series' catchphrase in episode 131 (season 2, show 1). It opened every episode for the rest of season 2, vanished from episodes 261-520, returned in episode 1A (season 5, episode 1), and lasted until the final episode, 130B (season 6, show 130).
The character of Spider-Man was provided free of charge from Marvel Comics. To commemorate the partnership between Marvel Comics and the Children's Television Workshop, Marvel Comics published a special series called "Spidey Super Stories" that featured easy-to-read adventures of Spider-Man that, on occasion, featured members of the Short Circus. A shortened version of the comic that featured only characters from the Marvel Universe appeared in the Electric Company's spin-off magazine.
The release of the Best of the Electric Company DVD boxed set on 7 February 2006 marked the first time in Sesame Workshop's history that unedited episodes of actual shows from its library were made available for purchase by the public.
Each episode of the pseudo-soap opera "Love of Chair" ended with the narrator (Ken Roberts) asking the cryptic question "And what about...Naomi?" referring to Naomi Foner-Gyllenhaal, an associate producer of the show during its first two seasons. She is an Oscar-nominated screenwriter (for Running on Empty (1988)), and the mother of actors Jake Gyllenhaal and Maggie Gyllenhaal.
The first 4 seasons were numbered in consecutive order, 1-520. Season 5 was numbered 1A-130A, and season 6, the last season produced, was numbered 1B-130B. A total of 780 episodes were produced, 130 per season, like its sister show, Sesame Street (1969), did until 1998.
Because sketches from previous seasons were reused in the same way that Sesame Street (1969) reused its sketches, the first season was in production for approximately 26 weeks, and this dwindled down to approximately 13 weeks of production for the sixth and final season.
For the "Letterman" sketches, Gene Wilder, who voiced the heroic title character, and Zero Mostel, who voiced the villainous Spell Binder, were so excited to be working with each other again after The Producers (1967) that they recorded their dialogue together, a rarity in animation. The two would work together in one film during the show's run called Rhinoceros (1974). Wilder was also devastated because of Mostel's death in 1977, soon after the show ended production.
The Blue Beetle, then owned by Charlton Comics, also appeared on the show toward the end of its run, although this version was a creation of the show's writers and was unrelated to the version of the super hero seen in the comics. Charlton Comics had ceased publication and was going through bankruptcy hearings at that time. The Blue Beetle character is now owned by DC Comics, and a new, unrelated Blue Beetle has recently come upon the scene, this one a DC Comics creation.