When 'Family Guy' writers decided to kill of the beloved family pet, Brian Griffin, nobody knew how serious it would become.  The outpouring of negative responses from fans definitely played a part in the decision to bring Brian back.

The PLOTLINE:  "Stewie devises a master plan to get the one and only thing he wants for Christmas."

Family baby and evil genius Stewie Griffin caught a younger version of himself at the mall purchasing a toy, after having traveled to present day via time machine. Current Stewie stole the time machine and — voila — the dog is saved.

Seth MacFarlane even took a minute to tweet about the change of heart after the show aired.