House of Anubis S01E12 - House of Cheats

Mara changes her appearance (and personality) to try and impress Mick and not be "boring"; she ruins Mick's sports gear by putting a red sock in the dryer with it. Alfie gets trapped in the cellar while going back to retrieve his zombie mask. Jerome is caught near the cellar by Victor and is sent to his room, unable to rescue Alfie who sees something traumatic in the cellar. Jerome enlists Fabian's help to rescue a shaken and traumatized Alfie from the cellar. The next day Alfie hyperventilates while trying to remember what happened, and Nina accidentally gives him the elixir from the cellar to drink. He collapses and is hospitalized. Nina feels so guilty that she quits Sibuna, handing her locket to Fabian