Caution: Wormhole! is the fourth episode of the Season 1 of Lloyd in Space, which was first broadcast on February 24, 2001.
Lloyd feels unappreciated by his family and friends, so on the school trip Lloyd and Eddie fall into the worm hole, which takes them to the dumpster 30 feet away. But everyone else thinks they are somewhere else, far, far away, in the universe so Lloyd and Eddie decide this is their big chance and use it to get whatever they want.
- This marks the first speaking appearance of Megan Uno.
- Clancy Brown as Officer Frank Horton
- Rachel Crane as Megan Uno
- Pamela Hayden as Douglas McNoggin
- Tony Jay as Dr. Werner Von Brain
- Ashley Johnson as Violet
- Nicolette Little as Francine Nebulon
- Tress MacNeille as Mrs. Bolt
- Anndi McAfee as Brittany Boviak
- Courtland Mead as Lloyd Nebulon
- Justin Shenkarow as Eddie Horton
- Ben Stein as Ranger Wormy
- April Winchell as Nora Nebulon