Mixing interviews with dramatic re-enactments, this season focuses on lethal love affairs and spouses driven to murder.
A Texas mom's death is ruled a suicide, but her family is suspicious of her minister husband. In London, a murder-for-hire plot unravels.
A rocky marriage, shady business deals and a stripper surround a death. Gossip swirls around Colorado police after an officer's wife is gunned down.
A South Dakota minister's sordid past deeds come to light after his wife is found in a tub. The death of a teacher's wife reveals deceit at school.
A newlywed's death looks like a robbery gone wrong, but police eye her EMT husband. A staircase fall isn't what it seems for childhood sweethearts.
Police catch a break after a New Jersey wife is found brutally killed. After a woman is slain in a park, incriminating statements lead to the culprit.
A wife's death exposes her husband's secrets - and his mistress. A mother reports that her son is missing, but his wife claims he's fine.
Three killings put a community on edge - is someone targeting military women? The discovery of a man's body in a pit reveals a devious plot.
A newlywed in Washington state harbors lies - and an ex-husband with a criminal past. In Ireland, a longtime illicit affair leads to fatal actions.
Police try to determine the mastermind behind a pilot's gruesome death in his own home. In Britain, a fatal street fight erupts over a love triangle.
A phone holds clues to the death of a woman with a penchant for dating sites. After a wife reports her spouse missing, police unearth a grisly scene.
A student's two new friends move into her Las Vegas home, but jealousies soon flare. A woman found in her car trunk had recently learned of an affair.
After a Nevada politician is found unconscious, police think her husband's actions are odd. A covert affair between co-workers takes a bad turn.
A cocktail waitress with a checkered past causes trouble for a married couple. In Sydney, Australia, a broken-off romance turns deadly.
A Florida business owner, a lingerie model and an ex-con are caught up in treachery. The death of a psychiatrist's wife uncovers a web of lies.
A wife with four kids leads a double life in a quiet community, then faces a deadly outcome. Marital strife and broken promises mark a murder plot.
An affair with a karate instructor in Oregon leads murder; a millionaire hides a dark secret in England.
When a husband is shot to death, police scrutinize his business style and yacht parties. Obsession and jealousy spiral out of control for two couples.
Rumors surround a religious couple who sought marriage counseling with their pastor. A hairdresser's apparent suicide doesn't match up with the clues.
A chilling find at a pizza shop reveals a deadly nationwide crime spree. Troubling signs of abuse and a vacation romance lead to a fatal outcome.
A young wife's been hiding secrets from her husband, who's found dead in an unsettling scene. Police wonder why an unknown assailant attacks a couple.
An obsessive ex-cop in Michigan is prepared to do anything for his lover; sex becomes a powerful weapon as a marriage falls apart in Ontario, Canada.
When a flight attendant drops out of communication, her worried friends start investigating. A wife's freewheeling spending strains her marriage.
A husband says an intruder viciously attacked him and his wife, but it's not the whole story. A shocking attack and two burglaries are no coincidence.
A Tennessee wife spins a strange tale about her lover killing her spouse. A couple's grown kids play a key role in solving their mom's disappearance.
Officials take a closer look at a school superintendent's love life when he's found dead. A wife claims domestic abuse, but her husband is missing.
After a husband dies in a raging fire, security cameras at his wife's workplace reveal lies. Police question why a couple on a night stroll get shot.
It appears that a pastor's wife died in a tragic car accident, but one trooper has doubts. A fiancé's past workplace affair leads to a tragic outcome.
A husband admits to an affair and says his wife attempted suicide over it. A mom apparently leaves her children; her spouse can't let go of one item.
After a husband is shot to death at home, his wife's family offers stunning clues. A feuding neighbor is among the suspects in a woman's slaying.
A cyber affair partner makes a shocking revelation, and a Georgia wife ends up dead. A young husband's strange medical issues confound doctors.
Jealousy and betrayal spiral out of control for three women and a man. A Wyoming woman's peculiar story leads police to a bloody scene at her home.
A workaholic dentist says an intruder attacked him and his wife, but the evidence doesn't match. Police question a wife decades after a vile killing.
The remains of a missing businessman finally turn up, and a suspect goes on the run. A grim finding contradicts a man's story that his wife left him.
Police examine a wife's wild lifestyle after a body is dumped on a golf course. Deep money troubles and an affair surround a mother's death.
Police learn of infidelity when a church choir member is shot to death. A wife starts an affair with a younger man, then her husband ends up dead.
A wife recovering from plastic surgery dies in her bathroom, and her kids grow suspicious. A husband says his pregnant wife accidentally shot herself.
Police link a helpful housekeeper, a gambling habit and a body found in a burning home. An estranged wife's odd comments cast suspicion over a death.
A newly married man soon develops a wandering eye, and violence strikes. A couple rekindles their romance with a cliffside hike, but only one returns.
A dead body turns up in a burning room after a murder mystery dinner. Investigators examine a bloody shoe print after a wife's violent stabbing death.
A biker dies after a sex party that ends with a depraved twist. A witness offers a clue after a wife vanishes from the farm she owns with her husband.
A jilted mistress with a disturbing past threatens to expose an affair. In Sweden, a sect member claims to receive religious text messages to kill.
Police unravel a complex scheme after a millionaire dies in a hail of bullets. An Ohio husband says his wife left him, then cops make a shocking find.
A steamy online romance turns vengeful after a true identity is revealed. A random attack during a stroll reveals a troubled marriage and duplicity.
A volatile relationship falls apart, leaving a battered body. A tycoon makes a bizarre 911 call, and his wife and her new friend are under suspicion.
A family carries secrets for years after the shooting death of a husband. An ex-lover, a strange flower delivery and a diary - is a stalker at work?
A married woman is drawn to a street hustler but now fears for her life. Two die in an apparent suicide pact, but years later a confession surfaces.
A controlling husband hatches an evil plan when his wife makes a bid for freedom. An engineer takes up with the babysitter and pursues dark thrills.
A wife whose husband has been flaunting an affair disappears from a parking lot. A man finds his wealthy business partner dead in his ransacked home.
A man's shooting looks like a tragic accident until police examine a 911 call. A firefighter dies in a blaze, and a tattoo artist gives a clue.
A life insurance policy and a safe full of bullets raise questions in a woman's death. A wife's string of hookups emerges after her husband is slain.
A wife starts an affair, and an erotic game turns violent. After a woman's brutal attack, phone records divulge a husband's secret predilections.
The suspect list grows after a Colorado dance teacher vanishes in the snowy night. Harassing notes arrive after a husband breaks off an affair.