SPOILERS: Whose leg does he have to hump to come back? Family Guy killed off Brian, the Griffin family dog, in Sunday night’s episode—a major plot twist. Brian was hit by a car, and left with a mess of bloody hashtags. To add insult to injury, Stewie’s time machine is broken, so he can’t go back in time and save him—and the family already got another dog. A little heavy for a Sunday night cartoon, no?