As Thanksgiving approaches, families around the US are gathering to give thanks, eat food, and annoy the hell out of one another. When your family starts arguing about your uncle’s drinking, your sister’s convict boyfriend, or your cousin’s decision to drop out of college, be glad that you don’t have to contend with killer robots, mad scientist parents, or sibling rivalry turned homicidal. We list science fiction families that will have you giving thanks for the mundane problems of your own dysfunctional clan.