The VHS release for The Haunted Mask features a behind the scenes sneak peek for A Night in Terror Tower, which was hosted by the episode's co-star, Corey Sevier.
The closing credits for the second television episode had a very fitting medieval version of the theme. However, they were exclusive to this television episode and were not featured on the previous one. This was also the first of three different closing credit themes, with the second being "Bad Hare Day" and the third being "The Headless Ghost".
This episode is based on Goosebumps book #27.
Diego Matamoros (Morgred) played the voice of the shadow figure in season four's "The Ghost Next Door".