Springfield's First Family are back for another series and we're not entirely sure that's a good thing at this stage. Nevertheless, the animated series continues to prevail and tonight a tornado hits town. Marge and Homer have a brush with death that prompts them to think about who would look after their kids if the worst were to happen, but finding suitable guardians for their brood is no easy feat - until they bump into super-cool couple Mav and Portia. He's a surfer and she's an environmental lawyer - but are they just too good to be true?