I just don't think I can fully describe how much I love this episode. Danielle returns to Amity Park to seek aid since she's dissolving into ectoplasm yet she doesn't realize that Vlad is in Amity Park. He then hires Valerie for her determination and hatred of ghosts to capture Danielle for a nice reward. Valerie then uses Danielle as bait and captures Danny as well who is able to convince the ghost huntress that Danielle is part human and worth saving. During the rescue Vlad uses his duplication power to trick to Valerie into thinking that he is an innocent victim. At the end after Danielle is saved Valerie discovers that Vlad Masters and Vlad Plasmius are the same.
Danielle was originally going to play a major part of series with the Fentons adopting her, but the series was cut short before it could happen. Not to mention how Valerie is going to act since she knows who Vlad really is. This particular episode had so much character development.