Zim’s class gets a new pet hamster named Peepi. Zim theories that its cuteness can be used as some type of mind control after observing is classmates’ reaction to it. Zim attaches a device to Peepi which causes it to grow to a monster-like size and develop superpowers, such as firing a lazer beam from its mouth. Unable to control it, Zim allows the hamster to rampage and destroy the city. But, when Peepi nears Zim’s base, Zim is forced to pair up with Dib and use alien technology to send the creature into deep space.
*This is the second time in the series where Zim inadvertly saves the humans.