"A Night in Terror Tower" is the 27th book in the Goosebumps franchise and was adapted into a two part episode in 1996. The two main protagonists Eddie brother and Sue who are siblings are on vacation in the town of London visit a castle called "Terror Tower" where they hear the story of Prince Edward and Princess Susannah (who was revealed to be them near the end). But when they were accidentally left behind by the tour group, they are chased by a man known as the Lord High Executioner who wants to take back to their original time and execute them.
This episode is one of my favorite episodes from Goosebumps, and what I like about this episode is that the plot was very good just like the book (which I haven't read, but I listen to the audiobook), the exterior was fantastic, this episode (and the book) was set in London, England, and England is one of the best countries, and the end credits theme used a medieval vacation of the Goosebumps theme.