A creature feeds on the brain tissue of a young boy after he ingests worm eggs, and a killer works its way through the body of a Vietnam veteran, laying waste to his organs and lymph system.

For more shocking, true stories about mysterious illnesses caused by parasites, listen to Monsters Inside Me, a new podcast from Animal Planet. Follow wherever you get your podcasts.

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The residents of Navasota, Texas, are horrified when one of the pillars of their community, 54 year-old Lonnie Turner Sr., is found shot dead in his home. As investigators dig into the case, they discover this brutal murder may be a family affair.

Season 2, Episode 3 originally aired on ID on 2/19/2012.

Stream full episodes of Nightmare Next Door on discovery+. Go to discoveryplus.com/nightmarenextdoor to start your 7-day free trial today. Terms apply.

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When 25-year-old Amy St. Laurent disappears after a night out on the town, the people of Portland, Maine, are terrified. With no body, police don't know what to make of it. But their worst fears are confirmed when a shocking discovery proves murder.

Season 2, Episode 2 originally aired on ID on February 12, 2012.

Stream full episodes of Nightmare Next Door on discovery+. Go to discoveryplus.com/nightmarenextdoor to start your 7-day free trial today. Terms apply.

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The bloody murder of Beth Grosskopf leaves the town of Freedom, Pennsylvania riddled with fear. Hopes for quick justice are dashed when the initial suspects don't pan out. But when someone reveals his inner demons, cops move in to catch a killer.

Season 2, Episode 1 originally aired on ID on January 15, 2012.

Stream full episodes of Nightmare Next Door on discovery+. Go to discoveryplus.com/nightmarenextdoor to start your 7-day free trial today. Terms apply.

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When the body of 18-year-old Breanna Schneller is discovered in her apartment, the residents of tranquil Wausau, Wisconsin are stunned. Police hope a cell phone and surveillance videos can help them unravel the mystery surrounding Breanna's death.

Season 1, Episode 20 originally aired on ID on January 8, 2012.

Stream full episodes of Nightmare Next Door on discovery+. Go to discoveryplus.com/nightmarenextdoor to start your 7-day free trial today. Terms apply.

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A small town is jolted awake when 31 year old Laura Wynn is found dead in her home. And when a double homicide hits a nearby town, people are terrified. Thirteen years later their fears are confirmed when DNA proves the killer lives among them.

Season 1, Episode 19 originally aired on ID on September 15, 2011. 

Stream full episodes of Nightmare Next Door on discovery+. Go to discoveryplus.com/nightmarenextdoor to start your 7-day free trial today. Terms apply.

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Grosse Pointe, Michigan is a privileged community untouched by homicide in over 60 years. So when Barbara Iske is found murdered in the driveway of a local home, the village is shocked. Police use the little evidence they have to catch the killer.

Season 1, Episode 17 originally aired on ID on September 8, 2011.

Stream full episodes of Nightmare Next Door on discovery+. Go to discoveryplus.com/nightmarenextdoor to start your 7-day free trial today. Terms apply.

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The tiny town of Boonville, Missouri is devastated when the body of eight-year-old Alyssa Owen is found near a rural country road. When another body turns up six weeks later, investigators soon learn that the senseless brutality of this double homicide.

Season 1, Episode 16 originally aired on ID on September 1, 2011.

Stream full episodes of Nightmare Next Door on discovery+. Go to discoveryplus.com/nightmarenextdoor to start your 7-day free trial today. Terms apply.

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When 56-year-old David Lunz is gunned down in his Palm Harbor, Florida home, this laid back community fears the worst. It takes investigators more than two years and a surprise clue found 600 miles from the crime scene to nail a killer from David's past.

Season 1, Episode 15 originally aired on ID  on August 25, 2011.

Stream full episodes of Nightmare Next Door on discovery+. Go to discoveryplus.com/nightmarenextdoor to start your 7-day free trial today. Terms apply.

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