It's Halloween, and Garfield has dresses up as "Catzilla," a fierce wild cat that lives at the zoo, to go out Trick or Treating. What Garfield doesn't know is that the real Catzilla has escaped from the zoo and the police are searching for it, leading to a wild case of mistaken identity! Will Garfield end up in a zoo? And what will Jon and Odie do if they run into Catzilla? Also featuring the stories "Underwater World" and "Perfect Pizza."