Elena finds out all about marvellous moths. Chantelle is with Dr Amir Khan to see one of the world's biggest moths while Rory and his son Sandy are in disguise being moth spies.

Chantelle and Rory's fact files explain how moths hide, how they can find their way in the dark and the differences between moths and butterflies. It's also time to find out how moths help the planet at night. This episode's Teeny Tiny Task is to plant some night-flowering plants.

James finds out all about some very cool sea creatures – starfish. Chantelle is with Dawood to investigate different types of starfish – one with chocolate chips and another that looks like a cushion. Rory and his son Sandy are on Longniddry Beach looking in rockpools for starfish and seastars.

Chantelle and Rory's fact files explain about the shape of starfish, how long they can live and how starfish stop other creatures eating them. It's also time to find out why they are an important keystone species. This episode's Teeny Tiny Task is to help the beach and the creatures by litter picking.