As Izzy grows suspicious of Corazon's daily routine, Charlie takes D.O.G. out for the day — and leaves Morgan with a long list of responsibilities.

Pup Academy celebrates a special day of student reviews, Charlie shares a meaningful gift with Morgan, and King's dark past comes to light.

The greatest friendship on earth is at risk when the constellation that powers Pup Academy fades out and humans no longer want dogs as best buds.