(This synopsis was written from memory; the show is not being aired anymore and I have no copy of the episode available for reference. I last saw it a few months before writing this, so my memory is still relatively fresh, but hardly complete. Please bear with me if any parts are vague and if guest characters names are omitted; I can't remember everything. Ken Robinson)

There's a steam monster haunting the boy's shower at Bela Lugosi jr. high. Luckily, the P.I.'s are on hand to stop it. But before they can do that, a new student uses his strange powers to reduce it to a little bite-size steam monster (which he then eats, believe it or not). The P.I.'s, having witnessed this display, are impressed and want him to join them as the 5th P.I. Not going to happen, though. Instead, this mysterious new student (whose name escapes me) takes them into the netherrealm as his prisoners. It turns out he is a Shadowcop, a sort of police officer from the spiritual world. He has brought the P.I.'