Bob Peterson invites himself over to his co-workers Gene and Jaye-Jaye Thurnau's new home to give them a housewarming present; later, Jaye-Jaye leaves the guys alone to run an errand, during which time they vanish.

Kerri Harris and her friend discover a camera secreted in the restroom at work; while police examine the evidence, Harris is stabbed to death in her office with her co-workers just a few feet away.

In Tacoma, Wash., businessman Robert Henry is murdered by a masked gunman, and his wife, Paula, points the finger at Henry's former business associate, Larry Shandola.

Alice Hufnagle is raped and murdered on Nov. 22, 2002; after following numerous leads and dead ends, police find the vital clues that lead them to Jeffery Vample, Alice's co-worker at a local pharmacy.

Theresa Wesolowski, 22, is murdered on May 29, 1999; police are baffled for nearly 10 years before finally getting a break when a new DNA technique identifies Wesolowski's coworker, Mark Libecki, as her killer.

After Gayle Isleib is shot to death on April 30, 1996, police identify her coworker, Tyronne Montgomery, as her killer; they find love poems as well as evidence that Montgomery planned to kidnap Isleib and murder her husband.

Sandra Berfield suffers years of harassment from coworker Steven Caruso and has him jailed for violating a restraining order; released, Caruso sends a pipe bomb to Berfield who is killed instantly after picking up a package left on her front porch.

Alisha Bromfield's supervisor, Brian Cooper, promotes her to team leader, but his motives are not entirely pure; Bromfield stands her ground, letting Cooper know she doesn't want a relationship beyond a professional one.

When Andrea Farrington meets fellow employee Alex Kozak, she feels that romance could be on the horizon, then Farrington's hopeful feelings are replaced by suspicion and fear, leading to a final rejection that has fatal consequences.

On a June morning, a cleaning lady finds property manager Melinda Schaefer stabbed to death in her ransacked office.

Caroline Nosal, a 24-year-old grocery store worker, befriends co-worker Christopher O'Kroley, but she soon complains to store management about O'Kroley's behavior leading to a tragic outcome.

Afer Leesa Nascimento is shot dead, a recently fired coworker, Lorenza Sam, is tied to her murder and arrested.

A deadly teen rivalry. A scorned lover willing to kill. A quick-rich scheme gone bad. The true-life mysteries detailed in this series are about revenge, betrayal and murder carried out by the people seemingly most trusted by each of the victims -- their lovers. The cases, dramatized via re-enactments, focus on the criminal's motive, and explore how the victim and lover met, the deepening relationship, the perceived betrayal and the obsession that led to the deadly act. Each hourlong episode takes viewers though all of the twists and turns that culminate in arrests, verdicts and justice.

When a crime scene throws suspicion in multiple directions, investigators may have a perfect murder on their hands. Ingenious killers are every detective's worst nightmare, as the crimes they commit are full of leads that become dead ends, and multiple suspects are ultimately discarded. But just when a murderer thinks he or she has successfully gotten away with it, one small clue leads to another and a cold case suddenly turns hot. "The Perfect Murder" follows actual cases and uses stylized re-enactments depicting detectives slowly putting the pieces together to complete intricate puzzles.