This is the first time Teela is seen without her tiara. The second will occur in The Witch and the Warrior (1983).
The story was loosely based on an early Filmation script premise called "Eclipse on Eternia" which featured Skeltor creating an eclipse, forcing He-Man to rearrange the planets.
When Prince Adam and Teela run through the Palace to their Sky Sleds, the photon-cannon weapons from Reign of the Monster (1983) can be seen in the background.
The Royal Palace courtyard where He-Man and Teela jump onto their Sky-Sleds to go to the Crimson Valley was first seen in A Friend in Need (1983) when Jarvan re-materializes there.
The animation of Orko after Man-At-Arms compliments his hearing is reused from the scene in Disappearing Act (1983) shortly before he and Cringer enter the Time Corridor.