<P> Regan hurries back to the farm . She and Marcus take refuge atop a grain silo, lighting a fire to alert their father to their whereabouts . However, they run out of lighter fluid and the fire dies down, causing Lee to assume that they are not there . A hatch door gives way and Marcus falls into the silo . He sinks into the corn and nearly suffocates, but Regan jumps in and saves him . They avoid further danger by clinging to the fallen silo door and survive a subsequent creature attack by hiding under it . Regan's repaired cochlear implant reacts to the proximity of the creature by emitting a piercingly loud high - frequency sound that drives the creature away . The children escape from the silo and reunite with Lee . </P> <P> The creature returns and Lee attacks it with a Pulaski, while Marcus and Regan hide in a pickup truck . Lee is wounded and Marcus shouts, attracting the creature to the truck . Lee uses sign language to tell Regan and Marcus that he loves them before sacrificing himself by yelling to draw the creature away from his children . Regan and Marcus roll the truck down a hill to escape and reunite with Evelyn and the baby at the farmhouse . </P> <P> Regan, who was not allowed in the house basement previously, sees her father's notes on the creatures and on his experimentation with several different implants . When the creature returns to invade the basement, Regan places the boosted implant on a nearby microphone, magnifying the feedback to ward off the creature . Painfully disoriented, the creature exposes the flesh beneath its armored head, and Evelyn shoots the creature in the head with a shotgun, destroying its head and killing it . The family views a CCTV monitor, showing two creatures attracted by the noise of the shotgun blast approaching the house . With their newly acquired knowledge of the creatures' weakness, the members of the family arm themselves and prepare to fight back . </P> <Ul> <Li> Emily Blunt as Evelyn Abbott, a doctor, wife of Lee, and the mother to their three children, Regan, Marcus, and Beau . Krasinski describes her character as wanting to ensure that their children "be fully - formed, fully - thinking people". </Li> <Li> John Krasinski, as Lee Abbott, an engineer, husband of Evelyn, and the father of Regan, Marcus, and Beau . Krasinski described his character as a survivalist who focuses on getting his family through each day . </Li> <Li> Millicent Simmonds as Regan Abbott, Lee and Evelyn's deaf daughter, and Marcus and Beau's sister . Krasinski said he sought a deaf actress, "...for many reasons, I didn't want a non-deaf actress pretending to be deaf . Most importantly though, because a deaf actress would help my knowledge and my understanding of the situations tenfold . I wanted someone who lives it and who could teach me about it on set ." </Li> <Li> Noah Jupe as Marcus Abbott, the oldest son of Lee and Evelyn, and Regan and Beau's brother . Krasinski noticed Jupe in the 2016 miniseries The Night Manager and later saw an early screening of the 2017 film Suburbicon to evaluate Jupe's performance . </Li> <Li> Cade Woodward as Beau Abbott, the younger son of Lee and Evelyn . </Li> <Li> Ezekiel & Evangelina Cavoli as newborn Baby Abbott . </Li> </Ul>

Does the family die in a quiet place