M.E.R.C. worries that his time with the Callisto family is over when they try out a more advanced robot named Axel.
- 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.
- May 23, 2015 (Latin America)
- May 30, 2015 (Spain and Portugal)
- May 28, 2015 (Germany)
- May 26, 2015 (Poland, Romania, Middle East, Africa)
- July 2, 2015 (Hungary)