<P> Doug and Bobby return to the trailer and discover Lynn and Ethel, who die shortly afterward . Goggle, who is watching the Carters with a pair of binoculars, is attacked by Beast, who tears his throat out, killing him . The next morning, Doug and Beast set out to rescue Catherine . During his search, Doug comes across an abandoned nuclear testing village, and is knocked unconscious by Big Mama (Ivana Turchetto). Upon awakening, he escapes an ice box filled with human body parts and continues his search, only to encounter Big Brain (Desmond Askew). After Big Brain tells him the mutants' origins, Doug is attacked by Pluto, who beats him and severs two of his fingers with an axe . Pluto almost kills Doug, but Doug manages to gain the upper hand while Pluto is distracted, and kills him with his own axe . </P> <P> Outside, Doug kills the mutant Cyst (Gregory Nicotero) and continues to search for Catherine . After ordering Lizard to kill Catherine, Big Brain is mauled to death by Beast . Lizard takes a cleaver and prepares to kill Catherine, but finds that Ruby has replaced the baby with a piglet and taken her . Doug sees Ruby running through the hills with Catherine and follows her . At the trailer, Brenda and Bobby discover their mother's body missing and track it to find Papa Jupiter eating her, so they lure him towards the trailer and prepare an explosive trap, which destroys the trailer, apparently killing Papa Jupiter . </P> <P> Doug catches up with Ruby, but before she can return Catherine, Lizard attacks him . Lizard and Doug have fight and Lizard is presumed dead . Ruby gives Doug his daughter back . Lizard, who is still alive aims a shotgun at Doug . In order to save Doug, Ruby tackles Lizard off a cliff, sending them falling to their deaths . Bobby and Brenda find that Papa Jupiter managed to survive their trap, and Brenda finishes him off . They are then reunited with an exhausted and bloody Doug, Catherine, and Beast . As the survivors of the Carter family embrace, an unknown mutant watches them through binoculars from the hills . </P> <Ul> <Li> Aaron Stanford as Doug Bukowski </Li> <Li> Kathleen Quinlan as Ethel Carter </Li> <Li> Vinessa Shaw as Lynn Carter - Bukowski </Li> <Li> Emilie de Ravin as Brenda Carter </Li> <Li> Dan Byrd as Bobby Carter </Li> <Li> Tom Bower as Jeb, the Gas Station Attendant </Li> <Li> Billy Drago as Papa Jupiter </Li> <Li> Robert Joy as Lizard </Li> <Li> Ted Levine as "Big" Bob Carter </Li> <Li> Desmond Askew as Big Brain </Li> <Li> Ezra Buzzington as Goggle </Li> <Li> Michael Bailey Smith as Pluto </Li> <Li> Laura Ortiz as Ruby </Li> <Li> Maisie Camilleri Preziosi as Catherine Bukowski </Li> <Li> Gregory Nicotero as Cyst </Li> <Li> Ivana Turchetto as Big Mama </Li> <Li> Maxime Giffard as First Victim </Li> <Li> Judith Jane Vallette as Venus </Li> <Li> Adam Perrell as Mercury </Li> </Ul>

What is the meaning of the hills have eyes