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In Devil You Know an ex movie star named Kathryn tries to make a come back in the film industry. The ex movie star has a deep dark secret and a daughter aspiring in her film making foot steps. Once Kathryn starts trying to work on her film career, a mysterious and unknown black mailer starts threatening to let her secret out. She retreats to a mansion in the woods with her assisant. Her daughter and husband soon join her. The night is filled with jealously and spite and those two don't mix well. Someone ends up dead after a spill of deceit and lies.

Devil You Know is a series that is currently running and has 4 seasons (26 episodes). The series first aired on June 15, 2011.

Devil You Know is available for streaming on the website, both individual episodes and full seasons. You can also watch Devil You Know on demand atiTunes online.

Wednesdays at 10:00 pm on Investigation Discovery
4 Seasons, 26 Episodes
June 15, 2011
Reality
7.5/10
Cast: Amanda Burton, Anthony Valentine, Matthew Marsh, Nicholas Jones, Pip Torrens
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Devil You Know Full Episode Guide

  • As women are attacked on the streets of Ocala, Florida; a mother begins doubting her devoted husband and the father of her three children. Melissa Fountain's life will be turned upside down when she learns the truth about her soul mate.

  • A beautiful psychology student vanishes without a trace. Her grieving sister, Alayne Katz, believes the culprit is close to home. She loses hope that justice will ever be served, until years later, a grisly discovery is made and the truth comes out.

  • A waitress returns home to rural Washington and 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.

  • A seemingly religious man is implicated in the disappearance of his wife and daughter.

  • A woman shoots her husband and then recruits her young daughter to help cover for the crime.

  • A son discovers his mother is a con artist.

  • 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 fa├žade is a serial killer who stalks teenaged-boys.

  • A pair of sisters discover their father, who is an arson investigator, is actually a serial arsonist

  • Following a nasty divorce, a flight attendant becomes the target of a hit man.

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