Watch Diabolical
- Wednesday 8:00 PM et/pt on Investigation Discovery
- 2 Seasons, 18 Episodes
- December 18, 2013
- Mystery
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/10 - Cast: Robert Duncan, Britt Prentice, Shasta Jones, Anne Giovanni
TV Shows
Watch Full Episodes of Diabolical
Diabolical Full Episode Guide
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Penny Knell is admitted to a special care facility, where a devious mastermind is waiting to prey on vulnerable people; when Penny's family gets ensnared in her web, the consequences will be fatal.
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Donna Scrivo alerts the local police, but days pass with no sign of her son anywhere. Then a grisly discovery of a severed human head and body parts along a rural highway reveals an act of shocking violence.
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2011 is off to a rocky start when a beloved Susanville police officer is found dead. What first looks like suicide morphs into a full blown murder investigation when his wife becomes a suspect and detectives uncover a story of love, lust and murder.
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Gina Coccia comes home from work to discover the bodies of her girlfriend, Lynn, and Lynn's nephew, Ronnie, shot and stabbed on the kitchen floor; the investigation leads police to a terrifying act of betrayal.
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On April 17, 2015, a Virginia hunter stumbles upon a grisly discovery in the woods: a woman with an execution style gun shot wound to the back of her head. As detectives begin their investigation, they uncover a twisted web of lies and crimes.
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On April 17, 2015, a Virginia hunter stumbles upon a grisly discovery in the woods: a woman with an execution style gun shot wound to the back of her head. As detectives begin their investigation, they uncover a twisted web of lies and crimes.
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In 2015, Detective Scott Sanderson finds himself solving one of the strangest cases of his career. At its center are a newborn and her missing mother. Before long he'll uncover a diabolical scheme that will destroy the lives of everyone it touches.
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George Kalomeris is a family man who looks after the less fortunate in his community. But after a dying man fingers George as the gunman, police discover a monster more diabolical than anyone could ever imagine possible
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After losing her husband in a tragic accident, God-fearing Cindy McKay claims she's had to bend the law to pay off his illicit debts. But authorities soon realize she's a criminal mastermind.
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Rainey Morin is a single mom who's finally found her soulmate. Robert Kowalski treats Rainey like a queen and her kids like gold, but beneath his bright veneer is a dark history threatening to wreak havoc.
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A young family in La Mirada, Cal., is out for an evening stroll when terror strikes.
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Pennsylvania native Janet Lynn Mickey's greatest dream is to start her own family. So, when she marries college football-star Darrell Tyburski her future seems secure. But plans change when the young couple has children, leading them down a dark path.
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After sneaking out of his parent's Garden Grove, Cal., house for a secret late-night party, 19-year-old Jose Najera returns home to find both parents dead on their bedroom floor.
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Michelle Donohue wants a loving and well-off family of her own. She burns through good men, valuing wealth more than love. But when she finally meets Mr. Right she gets a taste of her own medicine, sending her down a path of murder.
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David Messenger brutally murders his pregnant wife Heather in front of their 5-year-old son. The crime comes as a shock. Did he kill his wife in self-defense, did he fall victim to mental illness, or was something even more disturbing going on?
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When Christine Billis' car veers off the road and rams into a tree, her husband, Charles Billis, dies at the scene. Was Charles Billis' death a tragic accident or is Charles's death the result of a diabolically pre-meditated plan by a "˜black widow'?
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49-year old Neal Jacobson is the image of success. Then one morning Neal is found covered in blood by a Florida roadside, claiming that he just killed his entire family. Is Neal Jacobson the victim or is he simply a cold-blooded killer?
