"Who Stole the Stellosphere?" is the first segment of the sixth episode of Miles from Tomorrowland. It premiered on February 20, 2015 alongside "Rock N' Roll".
- Cullen McCarthy as Miles Callisto
- Fiona Bishop as Loretta Callisto
- Olivia Munn as Phoebe Callisto
- Tom Kenny as Leo Callisto
- Dee Bradley Baker as M.E.R.C.
- Mark Hamill as Gadfly Garnett
- Adrian Grenier as Captain Joe
- May 24, 2015 (Latin America)
- May 31, 2015 (Spain and Portugal)
- May 29, 2015 (Germany)
- May 27, 2015 (Poland, Romania, Middle East, Africa)
- July 3, 2015 (Hungary)