The backgrounds for Valley View Castle were seen earlier as the village of Blackmoor in The Red Knight (1985) and as Bluestone in The Prisoners of Beast Island (1985).
The shot of Adora and Bow looking up at Madame Razz and Broom is reused from Huntara (1985) in which they look up at a projection of Huntara.
Don Heckman also wrote Tracy Come Back (1986). This story also featured flashbacks to earlier adventures which were altered to make the bad guys seem triumphant.