When Adam and Duncan are sparring, Adam uses a shield to defend himself that is the animation model for the toy shield that came with the original He-Man action figure. This it the only appearance of said shield in the Filmation series.
Although neither Strongarm nor Lizard Man were part of the original Masters of the Universe toy-line, they did receive action figures in Mattycollector's Masters of the Universe Classics line. Strongarm was renamed 'Strong-or' because of copyright reasons and released in 2013, while Lizard Man was part of the 2015 releases.
Lizard Man was designed by Tom Tataranowicz and based on Filmation concept for the action figure that would eventually become Whiplash. "Lizzy" was finally turned into an action figure as part of the Masters of the Universe Classics line in 2015.
The story was loosely based on a Filmation script premise titled "She-Demon of Moon III", in which Queen Elmora had been placed under a curse by Skeletor centuries before.
The Travel Corridors room inside Castle Grayskull will be seen again in Dawn of Dragoon (1983), To Save Skeletor (1984) and Loo-Kee Lends a Hand (1985).