T.J. and Vince are so into the "Barnaby Boys" books that they dress up like the Barnaby Boys and try to solve the mystery of the suspicious substitute janitor, Earl Raymond. / T.J. receives an old history textbook with a treasure map that leads the gang, Randall, and the Ashleys out to get the treasure. But as they get closer, greed arises and the 4th graders fight for the treasure.
In his hatred of Valentine's Day, T.J. sends a "funny" valentine to every single girl on the playground to show them how stupid Valentine's Day is, but his plan soon backfires when the girls mistake them for "real" valentine cards. / Everyone is segregated once the Ashley's start giving ratings to everyone on the playground.
In this Halloween episode, Butch tells us three terrifying tales of Recess. Children of the Cornchip: Cornchip Girl eats some untested cornchips and turns into a werekid! The gang have to save her. When Bikes Attack!: The bikes that the kids ride to school everyday become alive and turn against their riders. Night of the Living Finsters: Lawson challenges Vince to spend the night in the graveyard, only for the gang to discover that the school is built on the Finster family graveyard.
The Recess Gang visits Kauaʻi so Gretchen can use a telescope to examine what she believes is a new planet. Meanwhile, an experiment designed to make people stop working zaps Stitch with its lazy beam. Lilo is forced to depend on her new friends to catch the experiment while Stitch takes a vacation.