Reis meets Plasticus, a giant whale made of plastic recovered from beaches and recycling centres. Meanwhile, Logey the Turtle explains why our oceans are so important and what threat all this plastic presents.
After learning that billions of plastic water bottles are used around the world every day, Paddy and Ynez decide to decorate refillable bottles and use them instead.
Logey is horrified to find Ynez drinking from a plastic straw and explains how dangerous they can be for sea creatures. So Paddy and Ynez embark on an experiment to find alternatives. Which is best - metal, glass, paper or no straw at all?
Reis and Ynez head to the Norfolk coast to take part in a beach clean, run by the Marine Conservation Society. They meet Shel, who shows them some of the strange, serious and downright curious things that have found their way onto the beach.
To limit the use of plastic bags, Paddy shows Ynez how to make a reusable bag out of an old t-shirt.
Paddy sorts through some old household cleaners and cosmetics, so he can get rid of any that contain microplastics, tiny pieces of plastic that get washed down the drains and end up in our oceans.