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?

The race is on to find all of the reflectors - and the clues lie in an incomplete Zodiac chart. Mr Sweet doesn't believe the gem has been stolen. Looks like Jerome's on his own now... Meanwhile, at the restaurant, Piper turns up posing as Patricia. Patricia decides to keep an eye on Piper. Sweet and Eddie are fooled that is, until Eddie and his dad see both Piper AND Patricia standing next to each other... Nina realizes Victor has his own copy of the Zodiac but his is more complete! Amber makes a copy but Fabian can't decipher any of the symbols. Meanwhile, Jerome hacks Jasper's computer and proof that he is working for the Collector and then he finds a coded call for help from Trudy...