Star Command is directly in the path of an asteroid field. Team Lightyear responds to the emergency and starts to destroy the asteroids, but they keep on coming. The source of the attack is an evil, female, Big-Headed alien known as Gravitina, the Mistress of Mass...and she has a big crush on Buzz.
- Patrick Warburton as Buzz Lightyear, LGMs
- Stephen Furst as Booster
- Larry Miller as XR
- Nicole Sullivan as Mira Nova
- Adam Carolla as Commander Nebula
- Kerri Kenney as Gravitina, Sally
- Frank Welker as Ranger