14 votes


Investigation Discovery 2013

Perfect on the outside, mental on the inside. Even the most kind-hearted people have a dark side looming. Diabolical looks at the minds of murderers with the question: "why did they do it?" Take a trip through the picture-perfect life and see the events that lead to a brutal murder. The tension builds throughout each episode as you dive deeper into the psychological workings of the murderer. With key insights from forensic psychologists and psychiatrists along with criminal profilers, a full analysis of the behavioral underpinnings and key moments in each crime will be on display. Diabolical shows how much people can conceal, until they blow.

Warning: the following content contains spoilers!

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The 10 Best Episodes of Diabolical

#1 - A Life of Lies (Season 3 - Episode 8)

Cynthia Roth drowns in the middle of a crowded lake. A decades-long trail of terror is uncovered by investigators. Detectives must take extraordinary measures to catch the killer.

The episode was rated 7.87 from 23 votes.


#2 - Devil Wear False Eyeslashes (Season 4 - Episode 7)

Three men die over a span of a dozen years, with no suspicion of wrongdoing and no files charged; but when a deadly car explosion rips through downtown Pensacola, Fla., a new investigation begins; all suspicion points toward just one person.

The episode was rated 7.84 from 19 votes.

#3 - Daddy's Little Nightmare (Season 4 - Episode 1)

"Daddy's Little Nightmare" In 2017, Federal Heights, CO., is feared when 69 yr old Bill Mussack is missing and gone without a trace. Police act fast to uncover a killer with a heinous plot before the evil-minded murderer strikes again.

The episode was rated 7.80 from 20 votes.

#4 - Family or Foe (Season 2 - Episode 7)

Terror strikes during a young family's evening stroll in La Mirada, California; nothing seems to add up during the criminal investigation; with the truth taking years to emerge.

The episode was rated 7.75 from 28 votes.


#5 - Accident Waiting to Happen (Season 2 - Episode 8)

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. Will Rainey find out before it's too late?

The episode was rated 7.74 from 23 votes.

#6 - Evil Sister Act (Season 4 - Episode 10)

When Samuel Johnson Jr. suddenly vanishes, investigators find themselves face-to-face with two sisters who know something; through a series of interrogations, they reveal an elaborate murder plot meticulously engineered by a puppeteer.

The episode was rated 7.74 from 19 votes.

#7 - The Rich Get Richer (Season 3 - Episode 7)

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.

The episode was rated 7.72 from 29 votes.


#8 - Sins Of A Mother (Season 4 - Episode 5)

In 1994, Lake Orion, Michigan is rocked by a vicious murder. At first, the crime is a mystery. But in a small town where everyone knows each other, rumors start flying. Soon, police expose a strange and twisted plot that no one saw coming.

The episode was rated 7.71 from 17 votes.

#9 - Caught in the Cover-Up (Season 4 - Episode 8)

In West Bloomfield, Mich., a simple affair between two coworkers turns complex as the two lovers are willing to do anything, even commit murder, to protect their darkest secret.

The episode was rated 7.70 from 20 votes.

#10 - Til' Death Do We Part (Season 2 - Episode 3)

Married right after graduating high school, Lyle and Carol Kopenkoskey are the couple that other couples want to be like. 40+ years of marriage later, add an old friend to the mix, a healthy dose of passion and jealousy, heat it up, and..

The episode was rated 7.68 from 34 votes.

#11 - Mother of All Murders
Season 2 - Episode 6

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 when the couple has children, plans change leading them down the darkest path.

The episode was rated from 37 votes.
#12 - Hands That Rob The Cradle
Season 4 - Episode 2

In early 1980, two eerily similar crimes occur 400 miles apart. They both leave young mother dead and an infant child stolen. Years later, police unravel a plot so cold-blooded, it leaves everyone even seasoned homicide detectives in utter shock.

The episode was rated from 15 votes.
#13 - Unhappy Birthday
Season 1 - Episode 1

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?

The episode was rated from 50 votes.
#14 - Killer Track Record
Season 4 - Episode 9

Three women die of the same mysterious illness, the hunt is on to prove their deaths are no accident. Investigators don't know that they are being played for fools by a killer lurking undetected. There's only one woman who can bring him down.

The episode was rated from 22 votes.
#15 - Murder is No Accident
Season 3 - Episode 9

Cynthia Roth drowns in the middle of a crowded lake. A decades-long trail of terror is uncovered by investigators. Detectives must take extraordinary measures to catch the killer.

The episode was rated from 24 votes.
#16 - Masking Evil
Season 4 - Episode 3

A burning car is found by the side of a highway on the same night a single mother of two is reported missing. These two events are connected, and connecting the dots will lead investigators to a notorious criminal who has been hiding in plain sight.

The episode was rated from 19 votes.
#17 - Control Freak
Season 3 - Episode 6

Donna Scrivo hasn't seen her adult son, Ramsay, in days, and she's worried; she alerts the police, but days pass with no sign of him anywhere; then the discovery of a severed head and body parts along a highway reveals an act of shocking violence.

The episode was rated from 28 votes.
#18 - Lie For Me
Season 4 - Episode 4

Air Force veteran Michael Giles disappears along with his savings of $206,000. Detectives discover a woman named Kwaneta Harris has been draining the man's accounts. But as they dig deeper, detectives uncover a massive conspiracy of greed and murder.

The episode was rated from 17 votes.
#19 - Someone's Lying
Season 3 - Episode 3

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.

The episode was rated from 29 votes.
#20 - Weeping Widow
Season 2 - Episode 9

After losing herhusband 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. Can police track her down before she claims her next victim?

The episode was rated from 29 votes.

Last updated: nov 20, 2022


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A little about me ๐Ÿ‘‹ I am a marketing student in Paris. I love spending afternoons with friends in a cafe or a park.

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