When a breakout of headlice hits South Park Elementary, Mrs. Garrison refuses to say which child brought the plague to the school. So, Cartman takes it upon himself to find out who it is so the kids can make fun of them. Meanwhile, a louse Travis, is desperate to save his fellow lice from imminent destruction from a conscious world.
Elenco: Trey Parker , Matt Stone , Mona Marshall , April Stewart , Isaac Hayes , Eliza Schneider , Mary Kay Bergman , Milan Agnone , Sebastian Yu , Jessie Jo Thomas , Jennifer Howell .