Jimmy returns from the Twonkus-3 comet with one of its native creatures in tow. Carl adopts the "Twonky" and brings it to class where, in front of everyone's eyes, it starts coughing up identical little creatures. But these sweet little creatures start mutating into wild monsters.

Now Jimmy's got to get them back to the comet before they destroy Retroville!

Estimated despatch 5-10 days after ordering.