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Andy reverses the school doors so that when someone comes in, they're locked in. He then gets Lik and Leech to chase him into the school, locking them in. But, Andy remembers that he dropped the spare keys while running, so he and Danny are locked in as well.
Episodes
1Just Stuffing 2Gooey Chewies 3Beat The Bomb 4Food Fight 5Emergency Spew Relish / Busting 6The Show Must Go On 7101 Underpants / Playing Dead 8Rhyme Time 9Very Bad Idea / Cockroaches 10It Came From East Gackle 11Campaign In The Butt 12The Royal Secret Society Of Zombies 13Best Enemies 14Merry Chaos 15Mascot 16Little Foot / Grandpa Crazy 17The Answers 18Gnome For the Holidays 19Very Scary Stuff 20Road Trip / Snow Job 21Wag The Kid 22Bring It Off 23Pranks a Lot 24Un-Masked Marauders 25Great American Lock-In 26TeenDreamboats