A chocolate-pudding "incident" sends George and Harold into hiding. But there's a new principal when they come back -- and no one remembers them!

Eager to get the campers out of his hair, Krupp orders them to climb Plummet Peak, where a terrifying creature is rumored to reside.

Harold and George don't ask for much -- just a fun scavenger hunt that doesn't include doing Krupp's errands. Careful what you wish for, fellas.

The boys use Melvin's new animal hybrid invention to make a creature that's a cross between a butt and a fly. But these butt-erflies are real monsters!

After Erica critiques their comic book, George and Harold create a brand-new character -- a vampire who sucks the joy out of everything.

Holy guacamole! George and Harold are so determined to win an avocado-growing contest that they accidentally turn their science teacher into a monster.

After Erica compares her suspension to a vacation, a jealous George and Harold pull every prank in the book so they can get suspended, too.

The Melvins' latest invention sends the boys' Dump Day "trash-alanche" into another dimension -- and inadvertently summons a monster.

With fun in short supply, Harold and George persuade Krupp to dump the campers in the middle of the forest so they can learn to rough it.

George and Harold train a rat for extra credit. But when their subject escapes into the sewers, he's doused with toxic waste and becomes ... Poopacabra!

Who knew a thawed-out dinosaur could read comics and pull pranks? Well, this one does -- and he's one of Harold and George's biggest fans.

Krupp's campers take on rich rivals in a hoity-toity boat race that also features a revenge-obsessed giant salamander. Paging Captain Underpants!

To steal Mr. Krupp's rule book from a tightly locked safe, the boys cook up a super-intelligent gas cloud who winds up turning against them.

It's a race against time as George and Harold try to get Mr. Krupp fired before he can have them expelled. But first: a faceoff with the Toot Fairy!

The campers' splat-tastic game of paintball is rather rudely interrupted by a foul and formidable fiend known only as Camoflush.

George and Harold get revenge on their gym teacher by writing him into a ridiculous new comic. But the joke's on them when life imitates art.

A school dance sounds like fun -- but only if the boys can keep their music teacher from playing DJ and putting everyone to sleep.

The boys travel back in time to stop Mr. Krupp from becoming a bully, only to find that their plan has turned him into a ruthless businessman.

Summer camp is on the line as Melvin's nanobots find a new host in Captain Underpants, forcing the boys to shrink down and go inside his brain.

It's parents' weekend at Lake Summer Camp, and Krupp's eager to make amends with Harold and George ... or so he says.

After injecting all the teachers with bee DNA, the Melvins run the new "hive mind" of the school -- until Ms. Ribble accidentally becomes queen bee.

After George and Harold work with Erica to create a new comic hero, she springs off the page -- and plunges into real-life crime fighting.

Despite being terrible at the job, Krupp wants to be the camp director again next summer. That's something Harold and George simply cannot abide.

To get out of an epic assignment, George and Harold go back in time to the moment homework was invented to try and stop it before it starts.

The boys' latest comic inspires their jorts-wearing Spanish teacher to become a superhero with otherworldly powers.