Flash Forward S01 E23 Saboteurs

Every year, the eighth graders outsmart VP Petrowsky and sabotage the float for the Parade of all District Schools, and this year Tucker and Christine join in. When Becca wins Petrowsky's trust by volunteering to be Float Cop, the girls plot to sabotage the float. When the boys realize it's too late for them, they join forces with the girls.