Who?

Josie convinces Corrine to make plans to accompany her to the movies. But privileges may be taken by Durst, who decides instead to give them a warning, which saves Corrine from her parents' reprimands. Meanwhile, Professor Z has an unsettling experience in his office: while waiting to be evaluated, after collecting fallen papers from the floor, he suddenly finds his head caught inside the wormhole, which makes him lose his memory. But that's not all that happens: while the group tries to find a solution, they realise that Professor Z can play the guitar, does not like science, and is afraid of clowns! When and how will he become himself again?