Final series of climate emergency drama set in a flooded future world written by Linda Marshall Griffiths.'The Library of Everything' - when what comes after is more dangerous than what came before.

Birdie begins to feel herself transforming. Jessie goes in search of her dad. And in the Floating City, Cal helps the Angel to escape sparking conflict with his dad.

BIRDIE ..... Poppy O’BrienGIL ..... Rupert HillCALEB ..... Cel SpellmanALEX…..William AshJESSIE ..... Sade MaloneLEO ….Hamish RushLAURIE ..... .Jenny Platt

Written by Linda Marshall GriffithsDirected by Nadia MolinariSound Design by Sharon Hughes

Programme consultants: Dr James M Lea; Dr Ian Dawson; Dr. Andrew F. Field.