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After a few weeks in the afterlife, Brian the dog is back on Family Guy. ABC News explains the resurrection: With help from a Christmas wish to save his best friend, baby Stewie travels back in time and pushes Brian out of the way of an oncoming car. Briefly, the two have a happy reunion; then the future Stewie disappears. The version of himself that remains has no idea about the would-be death, though Brian is aware of the rescue. Creator Seth MacFarlane says the plotline was a "lesson" for fans, Digital Spy notes: "And thus endeth our warm, fuzzy holiday lesson," MacFarlane tweeted. "Never take those you love for granted, for they can be gone in a flash." (Read more Family Guy stories.)