It's Dad's birthday, but he's been a misery guts all day and no one knows why. Mum, Adam and Jonny are dumbstruck when he finally reveals the reason he's so miserable: he's realised he'll never go into space, because he used a website to calculate the date he's going to die. Mum is horrified, and even more so when Dad admits he's also worked out the date of her death and that of the boys.

Meanwhile, Jim pops round to wish Jim a happy birthday: he's been practising his magic and conjures up some special 'tricks' for the birthday boy. Just when Dad thought things couldn't get any worse, his mother, aka 'Horrible Grandma', turns up uninvited and proceeds to make a terrible birthday the worst yet...