Harold and George can't wait to spend the summer together at camp. But not so fast, boys -- your old nemesis Mr. Krupp has a most unpleasant surprise.

Rumors swirl around the shadowy Bo Hweemuth, a mysterious student with secret gifts who has the whole school living in fear.

Stuck in separate camps, Harold and George unleash a hyperintelligent talking possum to scare the pants off of Krupp. What could possibly go wrong?

George and Harold trick Melvin into turning their bus into a time machine so they can reroute their field trip and see what ancient Rome was really like.

A T.P. prank gone wrong leads to clogged toilets -- and a fateful explosion -- that turns the boys' new French teacher into a mummy.

With Mr. Krupp gone and two terrible Melvins in charge, Harold and George fight back by hypnotizing their gym teacher, Mr. Meaner.

A final exam sends George and Harold to the Doom Dome, where they must battle Melvin -- who's been injected with powerful nanobots -- in order to pass.

The boys recruit kids to join the M.I.S.F.A.R.T.S. -- the Mega Incredible Search Force Adventure Rescue Team Squad -- and bring Mr. Krupp back to School.

The pressure's on Harold and George to tell the scariest campfire story ever. Perhaps their tale of an ill-fated frontier dentist will do the trick.

George and Harold want Cash Networth to buy the camp and fire Krupp. But before he'll agree to pony up the dough, Cash has a small request of his own.

The boys transfer to a bizarro version of Jerome Horwitz Elementary, where the teachers are nice, the kids are good ... and fun is nowhere to be found.

A run-of-the-mill arts and crafts session turns into an interdimensional adventure from which Harold, George and company may never return.

A fierce game of plot potato takes an unexpected twist when Melvin

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.

Captain Underpants becomes a wanted man when a criminal who looks just like him starts robbing banks. Can George and Harold help clear his name?

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.

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.

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.

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

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

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.