Martin and Chris swim with a narwhal pod, where they meet their new buddy, a baby narwhal. Martin is about to name the baby, when two horned narwhals start to battle with their horns. The brothers watch and explain what the horn is used for.
Join Molly of Denali show producer as she reads the book, Crane Song, aloud. The book is based on the episode where Molly comes along with scientists to research animals.
A minituarized Martin has been following Hero the Salmon on her Salmon run. They both swim into Aviva, who is standing in the river. Aviva and Martin follow Hero on part of her journey, when they get to one of Hero's obstacles, a waterfall.