An Unexpected Killer Episode Rating Graph

When a young mother is found dead in a field after a night out, police scour security video to retrace a suspect's steps; the discovery of a second crime scene leads to an arrest, before high-tech forensics reveal a truth no one expected.

When a young husband-to-be is found shot and stabbed, detectives investigate a secret affair, a kidnapping plot and a terrifying racist gang before unveiling a killer whose hidden criminal life leaves everyone stunned.

A restaurant is robbed and the night manager murdered leading police to investigate suspicious coworkers, a disgruntled ex-employee and a violent serial attacker. The case goes cold, but explosive new evidence leads to a killer nobody suspected.

A cat-loving and recently divorced young woman dipping her toes back in the dating game is beaten and strangled in a brutal and unusual way; investigators dive into the murky world of online dating to hunt a killer who could be ready to strike again.

In 1979 in Irvine, CA, detectives performing a welfare check discover the badly beaten body of a single young woman left bizarrely staged on her bed; fear in the community grows amid a rash of nearby murders until police are handed a break when a fresh look at old evidence points to the killer.

A beloved teacher and mother of four silently vanishes in the middle of the night. A blood-soaked bedroom and horrific lakeside discovery point police to a killer close to home until mysterious tracks in the mud lead to a culprit no one suspected

When a family that runs a beloved vet clinic is gunned down, police investigate disgruntled tenants, a pet owner with an axe to grind and an estranged son. The case stalls until detectives uncover a twisted plot by someone who seemed above suspicion.

When an outgoing college student is gunned down, police investigate disapproving roommates, a psychic, and an infamous serial killer. However, decades-old evidence reveals a killer that original detectives had previously overlooked.

A devoted mother is stabbed to death in a horrifying attack and suspicion falls on those closest to her, but while a cryptic note and a violent crime spree baffle detectives at first, they eventually track down a deranged killer no one predicted.

When a beloved elderly woman is viciously murdered, detectives discover a chilling connection to another unsolved murder. The trail points to someone from her past and investigators race to hunt the killer down before they can strike again.

A vibrant young mother of three is murdered in the safety of her own home and investigators look to a history of troubled romances, but when the case goes cold and police can't find the killer, a phone call leads to a culprit hiding in plain sight.

A wealthy trader and father of four is gunned-down at home while his family is tied up in a closet; police dig into affairs, mob links and a missing coworker, until a chilling new lead and a taped phone call reveal a shocking plot decades later.

After a Texas mother is found murdered in an office bathroom, her husband admits a disturbing past while police chase down a serial killer; the case goes cold until an oversight leads to a surprise suspect and an FBI manhunt south of the border.

When an athletic and popular college student is violently murdered in her apartment, police track down several surprising suspects, including one with a disturbing obsession, before crucial evidence unmasks a dangerous predator no one saw coming.