It's a sunny day and Roy is having a great time playing 'piggy in the middle' with Becky and Tristan, and splashing about in the paddling pool. Between Maura heading to the shops, and Bill getting distracted with a selection box and an old pile of comics, no-one remembers to put sunscreen on Roy. And because he's a cartoon, when Roy gets sunburnt, he gets sunburnt like no other boy! Slowly, he turns bright pink and his hands turn into claws. Oh no, he's turning into a lobster! And Maura will be back any minute. What will they do?