When Fenton disappears while in Europe, Joe and Frank go there to find him. Eventually they meet a Romanian police inspector who's working with their father. They also run into Nancy Drew; it seems that Fenton was working for her father and she came to find out what he learned. Eventually they find themselves in the village where Dracula is from.
Did You Know?
This marked the first time, including the characters' respective book series, that the Hardy Boys and Nancy Drew had a crossover. However, in later years this would become a frequent occurrence. See more
Pamela Sue Martin gets a Guest Star credit in this episode, despite the fact that she plays one of the title characters of the series. See more