The Blue Whale Charm

The Blue Whale Charm is the 39th episode of Season 4.

Summary
Kwazii gains a blue whale charm on his bracelet and learns it gives him a super sonic scream that can be heard from 1000 miles away, break anyone’s eardrums, and break through glass and other hard materials after Peso accidentally steps on his tail, but when his new power accidentally breaks the Octopod’s windows, they start to spring a leak and it’s up to him and the Octonauts to fix them before the Octopod floods.

Plot
The episode begins at

Transcript
Kwazii (Narrating): The Blue Whale Charm.