A shapeshifting monster is loose in the house, able to disguise itself as anything - or anyone. Unhappy with some changes he's noticed lately, Charlie is convinced that one of his so-called 'friends' is not what they seem.
When an ex-chores boy re-appears wearing Helsing's invisibility jacket the gang are tasked with destroying it. But can Pierce resist the temptation to be bad?
Que possesses Charlie's body to help him out at school, but when she learns about the race for class captain, she sees a chance to prove how normal she can be.
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.
Snorp is undergoing some wild changes, shedding his old skin and becoming something newer and weirder. Faced with the prospect of losing her beloved friend, Que is having a hard time accepting the situation.
When Wolfman appears as Charlie's new substitute teacher, school is suddenly a lot more fun. But Charlie has a feeling he's hiding his true intentions.
When Helsing's past failures are exposed, the gang travel back through time to help him succeed. But Young Helsing is a lot different than they expected.
