USA TODAY Spoiler alert! The following article reveals the ending of "A Quiet Place Part II." Stop reading if you have not seen the movie, now in theaters. It's the end of the world, but the kids are alright. In the final scene of John Krasinski's post-apocalyptic horror thriller "A Quiet Place Part II" (now in theaters), the deaf Regan (Millicent Simmonds) and her younger brother Marcus (Noah Jupe) step up and become the heroes of the movie, protecting the adults from the talon-clawed, razor-toothed monsters that are terrorizing Earth. Fleeing the creatures following a deadly rampage, Regan and fellow survivor Emmett (Cillian Murphy) find shelter inside an abandoned radio station, where Emmett comes face to face with yet another alien. Knowing the monsters' hyper-sensitivity to sound, Regan hooks her hearing aid up to the radio tower, creating a strident noise that temporarily paralyzes the beast before she fatally beats it with a metal pipe.