It's not that hard to do. The soaps have done this same thing for decades. Even Dallas brought back to life a dead character. Roseanne can wake up in a hospital hooked up to all sorts of i.v.s and monitors. She overdosed & hallucinated while in a coma that she was dead and the family carried on without her, and voila! She awakens from the coma and goes back home to be the matriarch she always was.