Isaac is a sock-crazy alien. He visits North Finchley from outer space, in order to steal socks from our drawers. He deposits Daddy's socks, Mummy's socks, and Dylan's socks in secret piles throughout the house; recently we found a stash behind the wine glasses. Isaac normally likes to walk while clutching at least one sock in each hand, but he never wears socks upon his feet. Whenever we try to put socks on Isaac's feet, he pulls them off and adds them to the hidden piles. This would be a problem in the snowy weather, except for Isaac's hardy alien physiology.