Devil You Know

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Investigation Discovery Premiered Jun 15, 2011 In Season

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  • Civil War Serial Killer

    Full Episode

    S 3 : Ep 4 - 11/14/13

    As young women go missing across the Midwest, police are on the hunt for a twisted serial killer. To get their man, they place an informant inside a maximum security prison to find answers they need.moreless
  • Under the Melting Snow

    Full Episode

    S 3 : Ep 3 - 11/14/13

    A sister suspects her troubled brother knows more than he should about women who are missing from the streets of Edmonton. Only when she looks inside his hockey bag, does she make a shocking discovery.moreless
  • Against All Odds

    Full Episode

    S 2 : Ep 8 - 11/28/12

    A waitress returns home to rural Washington where she falls in love with a handsome farmhand. She is forced to fight for her life when she becomes the victim of a vicious attack at the hands of a predator, who, police believe, is a serial killer.moreless
  • The Cleveland Strangler

    Full Episode

    S 2 : Ep 7 - 11/14/12

    As women disappear off the streets of East Cleveland. Lori Frazier has no idea that her charming boyfriend is living a treacherous double life. Her life is at risk until the day she seeks recovery, but eleven other vulnerable women are not so lucky.moreless
  • Mother Knows Best

    Full Episode

    S 2 : Ep 6 - 10/24/12

    A son discovers his mother is a con artist of epic proportions, and will stop at nothing to get what she wants. While Kent Walker avoids her evil influence, he fails to protect his younger brother from becoming her lackey in crime,and a deadly killer.moreless
  • Twisted Faith

    Full Episode

    S 2 : Ep 5 - 11/7/12

    The wife and daughter of a successful senior manager disappear from their home on a dark winter's night. As family and friends wait anxiously for news of their return, police hone in on Michael Blagg, a respected Christian who is hiding a twisted secret.moreless
  • Buried Secrets

    Full Episode

    S 2 : Ep 4 - 10/31/12

    A young girl is forced to assist her mother in a terrible crime and bury the secret for twenty years. The secret almost destroys Kim Wohlert until she decides to bring her mother to justice.moreless
  • House of Horrors

    Full Episode

    S 2 : Ep 3 - 10/24/12

    A sister discovers that her beloved big brother is living a horrific double life. John Wayne Gacy sees the pillar of success with a booming contracting business, but beneath his façade is a serial killer who stalks teenaged-boys.moreless
  • Unfriendly Fire

    Full Episode

    S 2 : Ep 2 - 10/17/12

    Two sisters believe that their dad is an All-American hero and highly respected arson investigator. Their dreams are crushed when they discover that he is in fact one of the worst serial arsonists of all times.moreless
  • Evil in First Class

    Full Episode

    S 2 : Ep 1 - 10/17/12

    A beautiful flight attendant falls in love with a wealthy businessman,who promises the world. But Heather Grossman's life comes crashing down after a bitter divorce, when she becomes the target of a hit-man. She is left fighting for her life and justice.moreless
  • In Bed with the Devil

    Full Episode

    S 1 : Ep 22 - 11/18/12

    After wasting years in a troubled marriage, Judith Mawson had finally hit the jackpot when she met Gary Ridgeway. But her prefect world would come crashing down the day police showed up at her door with questions about the Green River serial killer.moreless
  • The Wily Widower

    Full Episode

    S 1 : Ep 21 - 11/18/12

    When Barbara Daniels met a charming Irish bachelor, Oliver Killeen, she fell head over heels almost instantly. But the honeymoon abruptly ended when his cruel intentions surfaced. Had her manipulative husband pulled the same trick on other women?moreless
  • Life on the Run

    Full Episode

    S 1 : Ep 20 - 11/18/12

    Every family has its secrets but Chip St. Clair survived the darkest of all. When Chip was an adult he discovered that his whole childhood had been a lie. His dad was a convicted child killer who'd broken out of prison and--taken Chip on the run.moreless
  • A Very Unusual Robber

    Full Episode

    S 1 : Ep 19 - 11/18/12

    This is the story of three law abiding brothers who make a horrifying discovery that their father is an armed bank robber. As if that isn't bad enough - now they must turn him in.moreless
  • A Twisted Mind

    Full Episode

    S 1 : Ep 18 - 10/26/11

    Terri Lemoine's boyfriend, Sean Vincent Gillis, a loveable computer nerd, appeared to be harmless. When police busted their door down and told her that Sean was a serial killer, she laughed and told them they had the wrong house. She was dead wrong.moreless
  • A Serial Killer in the Family

    Full Episode

    S 1 : Ep 17 - 11/18/12

    Jenn Carson loved her dad more than anything. When she was a baby, he was the one who stayed at home to look after her while her mom was working. But this heavenly match was headed for hell. Jenn's own flesh and blood turned out to be a serial killer.moreless
  • Devil of a Husband

    Full Episode

    S 1 : Ep 16 - 11/18/12

    When Barbra Reifel said "I do" to oral surgeon Michael Mastromarino in 1992, she thought her fairytale was just starting. Barbra never dreamed that 14 years later, her husband would be the mastermind behind an unthinkable, grisly business.moreless
  • The Ultimate Betrayal

    Full Episode

    S 1 : Ep 14 - 11/18/12

    When a teenage girl is murdered the killer taunts police. Behind the voice was a devoted husband and father with a terrifying double life. This is the story of his unsuspecting wife who would have to live with the discovery that she married the devil.moreless
  • Devil of a Dad

    Full Episode

    S 1 : Ep 13 - 11/18/12

    Life for the Boczkowski children was nothing short of a dream. They had two doting parents who ran an ice cream store. That innocence was ripped away when their mother and then their stepmother mysteriously die. Could their own father be the culprit?moreless
  • Devil in a Pinstripe Suit

    Full Episode

    S 1 : Ep 12 - 11/18/12

    Louise Gallagher had the perfect life on paper. Two sweet daughters, a lovely home, and a partner position at a large communications firm. But in a matter of months, she would leave it all behind to run from the law with her conniving lover, Conrad Cini.moreless
  • Poisonous Lover

    Full Episode

    S 1 : Ep 11 - 11/18/12

    When Ashley Wallace's father and stepfather both die during her childhood, it seems like a terribly unfair fate. An investigation zeros in on Ashley's mother, Stacey Castor. Little do they know their investigation puts Stacey's daughters at risk.moreless
  • Stalking Evil

    Full Episode

    S 1 : Ep 10 - 11/18/12

    A wife discovers that her husband is a serial rapist. When the police won't help her its up to her to get the proof she needs.
  • Daddy Dearest

    Full Episode

    S 1 : Ep 9 - 11/18/12

    Melissa Moore enjoyed a carefree childhood in Toponish, Washington. She thought her father, Keith Jesperson, could do no wrong. But that all changed the day he abandoned the family and took on a much more sinister role as the "Happy Face Killer".moreless
  • Looks Can Kill

    Full Episode

    S 1 : Ep 8 - 11/18/12

    Dewayne Barrentine couldn't believe his luck when a beautiful woman dropped into his life. But voluptuous Tausha Fields had a dark past that was about to catch up with her, and Dewayne had no idea what was about to hit him.moreless
  • Devil in Disguise

    Full Episode

    S 1 : Ep 7 - 11/18/12

    Barbara Bentley could not believe her luck when she met Admiral John Perry. The worldly Navy man brought sophistication to Barbara's life, and she was smitten. But John's scam would unravel when military officials started to question his authenticity.moreless
  • Stariway to Hell

    Full Episode

    S 1 : Ep 6 - 11/18/12

    Caitlin Atwater's life was shattered when her mother died in an accident. At first, it looked as if she'd fallen down the stairs at home but police weren't so sure.It turned out that Michael Peterson was hiding a terrible secret.moreless
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