Brian, “Family Guy”

After the Griffin family's beloved pooch Brian was shockingly struck by a car and killed, poor Stewie made it his Christmas wish to bring his best friend back to life. Thanks to the family's new dog, Vinnie, Stewie discovers a time-traveling version of himself and swipes his time machine to go back to the moment before Brian's crash. Executive producer Seth MacFarlane, who voices Brian, used the story as a holiday "lesson," tweeting to "never take those you love for granted, for they can be gone in a flash."