Story: Searching for the home of a lost luminous Sea Star, the Octonauts crash-land in the Midnight Zone, having met Brittle stars and a Sunflower starfish on the way down.

The Octonauts is a British children's television series, produced by Silvergate Media for the BBC channel Cbeebies. The series is animated in Ireland by Brown Bag Films but uses British voice actors. The TV series is based on American-Canadian children's books written by Vicki Wong and Michael C. Murphy of Meomi Design Inc.