Motive to Murder
S01:É01 - S01:E01 - Deadly Affairs
A Navy doctor is killed, his wife critically injured, exposing a web of secrets and betrayal.
S01:É02 - S01:E02 - Psycho Shooter
In 2011, a gunman kills six and wounds 13, targeting Congresswoman Gabrielle Giffords in Arizona. Police arrest a disturbed 22-year-old with a history of alarming behavior.
S01:É03 - S01:E03 - Killers by Blood
A grandfather's disappearance in rural Utah leads to a multi-state search, uncovering a shocking murder by a father-son duo.
S01:É04 - S01:E04 - Texas Teen Love Triangle
A teen's murder in Mansfield, Texas, reveals a chilling tale of obsession, revenge, and a love triangle.
S01:É05 - S01:E05 - Pickaxe Murders
In Houston, a brutal crime scene leads police to a petite woman who claims to find sexual satisfaction in killing.
S01:É06 - S01:E06 - Fast Food Massacre
Two robbers kill five employees at a Wendy's in Queens, New York, leaving two others for dead. A survivor's testimony unveils a story of revenge and betrayal.
S01:É07 - S01:E07 - Speed Freak Killers
A drug-fueled killing spree terrorizes a small California town, where police uncover two childhood friends who kill for thrills.
S01:É08 - S01:E08 - Misogynist Murderer
In an Australian town, bodies of women are found with strange marks, leading police to a 20-year-old man who claims to be following a "sign" to kill.
S01:É09 - S01:E09 - Southside Slayer
In 1986 LA, over 50 African-American women are found dead, dumped in the trash. The killer is caught when he is seen pushing his latest victim in a shopping cart through the streets.
S01:É10 - S01:E10 - South African Strangler
A police reservist finds a mass grave near Johannesburg, linked to a child advocacy leader who targets women resembling a mystery woman from his past.
S01:É11 - S01:E11 - Camden Ripper
A homeless man finds body parts in a North London dumpster, leading police to a killer. The case breaks when a suspect's door reveals weapons and a dismembered victim.
S01:É12 - S01:E12 - Cosa Nostra Killer
For decades, Italy fears the cold-blooded Mafia hitman "Ice Eyes", responsible for 80 murders. However, he is betrayed while planning the mob's most daring hit.
S01:É13 - S01:E13 - Bound to Die
Lizzi Marriott, 19, goes missing, and Kat McDonough admits she offered her to her abusive boyfriend, Seth Mazzaglia, who killed her.
S01:É14 - S01:E14 - Doctor Death
A respected English doctor is suspected of killing elderly patients, and when a will is contested, the truth reveals him as Britain's most prolific killer.
S01:É15 - S01:E15 - Texas Tower Sniper
In America's first mass shooting, a sniper opens fire from the University of Texas clock tower. As the body count rises, two cops and a civilian make a daring climb to stop him.
S01:É16 - S01:E16 - Co-Ed Killer
Young, female students have disappeared with alarming frequency from the college town of Santa Cruz, California. Mutilated body parts show up as a human jigsaw puzzle.
S01:É17 - S01:E17 - Hawaiian Horror
A man kills seven in a Honolulu office, and police find a disturbed suspect haunted by his mother's ghost and paranoid of his co-workers.
S01:É18 - S01:E18 - The Killer Nurse
Patients in New Jersey and Pennsylvania die mysteriously, leading to a meek man seeking control over life and death.
S01:É19 - S01:E19 - Snuff Film Killers
A fisherman finds a woman's body in Missouri, leading police to Richard Davis, whose camcorder reveals footage of assaults and murders of missing women.
S01:É20 - S01:E20 - Christmas Eve Massacre
A man in a Santa suit kills at a Christmas party in Covina, California, then flees with cash and a plane ticket, revealing a shocking motive.