While listed as S2E11, some broadcast schedules and home media releases place it differently; for instance, the Fringe subreddit notes a different "S2E11" for that series entirely.
Ethan, Benny, and Sarah must find a way to reverse the spell before midnight, or the transformations will become permanent. Character Transformations: [S2E11] Halloweird
The plot revolves around Ethan’s "nerd-fest" Halloween party, which turns dangerous when a magical mask worn by Rory transforms all the guests into real-life versions of their costumes. While listed as S2E11, some broadcast schedules and
Becomes possessed by an ancient shaman spirit while wearing the 15,000-year-old magic mask. Jane: Rory's mask turns Ethan’s sister into a cat. Becomes possessed by an ancient shaman spirit while
Benny eventually uses his magic to blast the mask off Rory, breaking the spell just as Ethan and Sarah are about to kiss. Key Details & Trivia