Diabolical Season 3: Episode Guide & Ratings

In 2017, Federal Heights, CO, is filled with fear when 69-year-old veteran Bill Mussack is reported missing, gone without a trace; police act fast to uncover a diabolical killer with a heinous plot before the malicious murderer strikes again.

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.

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

Air Force veteran Michael Giles disappears along with his savings of $206,000 and detectives find a that Kwaneta Harris has been draining his accounts.

In 1994, Lake Orion, MI, is rocked by a murder; at first, the crime is a mystery -- but in a small town where everyone knows each other, rumors start flying. Police soon expose a strange and twisted plot that no one saw coming.

In Las Vegas, a beloved father of four is found dead in his car; he's been bound, gagged, and asphyxiated. Witnesses lead detectives to a local man named John Brian Ray, but this troubled man is just a pawn in the game of a criminal mastermind.

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, FL, a new investigation begins; all suspicion points toward just one person.

In West Bloomfield, MI, 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.

Three women die of the same mysterious illness, and the hunt is on to prove their deaths were no accident; investigators don't realize they're being played for fools by a sinister killer lurking undetected.

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.