When our heroes meet a couple of environmental protestors, they immediately decide to up their activism game. It turns out the universe isn't ready for the disaster that they cause.

The Amigonauts must retrieve missing school property from a parallel universe inside a bag, but Big Carl the Junkyard King won't easily let his newfound treasures go.

Herby's competitive streak results in a nasty cold virus that spreads to the entire student body and threatens the Academy's tethered connection to Earth.