House of Oblivion/House of Snoops
Fabian is now unable to remember his own name - he even forgets who Nina is. Vera plants the ox bell in his room, but hears Nina and Fabian coming so she hides in the closet. They find the ox bell and take it to the tunnels, completing the task, curing them all. But their celebrations are short lived as Victor and Vera hatch their plan, leaving Nina and her friends to walk into a trap. Victor and Vera's plan backfires, leaving the Sibunas to return the Ox Bell to the Library. Alfie, Fabian and Nina explore the next task tunnel and realize that if they finish this task, they'll find the mask! Patricia has to admit to her friends that she has been keeping a big secret, her twin sister Piper. Upstairs, Trudy gets closer to the truth about Vera. But has she gone too far?