|The Operation Deep Freeze|
|Season 04, Episode 10|
The Convict Fish
Captain Barnacles, Kwazii, and Peso are visiting The Polar Scout Emergency Post run by Tracker - a young polar bear trained by Captain Barnacles. Suddenly they recieve a signal for help from a deserted research station on the opposite side of the worl. Antarctica. Whoever could have sent the signal, the Octonauts have to answer it. Once they get to Antarctica they find out that the person who called for help was a friend of Captain Barnacles named Professor Natquik.
In 2017, This episode won the Annie Awards at the 45th Annual Annies Awards by the nomination for "Best Television Production For Preschool Children" https://annieawards.org/nominees/production-categories/best-animated-television-broadcast-production-for-preschool-children