The Callistos must find a way to stop S'Leet from stealing the Arkstar after he freezes the Stellosphere.
- Wil Wheaton as S'Leet
- Justin Felbinger as Miles Callisto
- Fiona Bishop as Loretta Callisto
- Tom Kenny as Leo Callisto/Flurrbo
- Olivia Munn as Phoebe Callisto
- Dee Bradley Baker as M.E.R.C.
- Jeff Bennett as Foreman Bot/Blizzbert
- Grey DeLisle as Stella