When the gang learn of Helsing's swamp-like pool full of rubbish and living pool toys, they're tasked with cleaning it, but Pierce is scared to get his watch wet - until he's taken by a mysterious fish monster named Finn.

Charlie brings a musclebound future version of himself back to the present to train him for success. But Que's curious how he got so famous...

Someone at school has been using magic to cheat in the talent show. To find the supplier, Pierce is going to have to go undercover.