Octonauts

The Urchin Invasion (3x18)

Season finale

Air date: Mar 21, 2014

The Octonauts head to the kelp forest to visit Shellington's sister, Pearl, and her newborn son Periwinkle - only to find the forest endangered by an infestation of kelp-eating urchins!

Rank #12390

Premiered: Oct 2010
Episodes: 130
Followers: 10

Running
CBeebies
Daily at 20