"Miles Underwater" is the second segment of the thirty-eighth episode of Miles from Tomorrowland. It premiered on September 24, 2016 alongside "The First Day of Galactic School", and is the second segment of the eighth episode in the second season.
When Miles tries Leo’s new water maker machine, he accidentally floods the Stellosphere.
- Justin Felbinger as Miles Callisto
- Fiona Bishop as Loretta Callisto
- Tom Kenny as Leo Callisto
- Olivia Munn as Phoebe Callisto
- Dee Bradley Baker as M.E.R.C.
- Grey DeLisle as Stella
- Danny Jacob as Admiral Watson
- Diedrich Bader as Admiral Crick
- Miles likes having Mars berries in his Orbit O's cereal.