Episode 1 - The Butterfly

Dateline investigates the case of a young Fairfield, Ohio, woman, 21-year-old Katelyn Markham, who vanishes one summer night in 2011, prompting her community to conduct a massive search. When her skeletal remains are found in Indiana two years later, investigators question her friends and family to uncover her killer, but It takes 12 years and a detective with dogged determination.

Episode 2 - Wrong Turns

A new father is found dead on the side of a road. Then the stabbing of a young woman leads police on a high speed chase. Could these two chilling murders be connected? Josh Mankiewicz reports.

Episode 3 - Down the Rabbit Hole

In Humble, Texas, a frantic 911 caller, 16-year-old Keri Murphy, reports hearing her mother's screams after an intruder entered their home. When first responders arrive, they find Mary Ann Murphy dead after receiving more than 70 stab wounds. What happened on that dark summer night?

Episode 4 - The Night of the Nor'easter

A monster storm had rolled into Canton, Massachusetts, and Karen Read's boyfriend, police officer John O'Keefe, was dead, his body discovered in front of another officer's house. Karen was charged with John's death. Was she to blame?

Episode 5 - Deadly Omission

In Marietta, Georgia, a woman's murder shines a light on an unsolved mystery from years earlier. As the connection between the two cases becomes clear, a long-hidden truth surfaces. Could a master manipulator be behind both crimes? Andrea Canning reports.

Episode 6 - After the Halloween party

After a Halloween party at a country club, a wife and mother of four vanishes. Nearly a decade later, a private investigator claims to uncover chilling new clues that turn the town upside down.

Episode 7 - The Menendez Brothers: Chance at Freedom

Latest developments and new interviews in the high-profile murder trial of Lyle and Erik Menendez.

Episode 8 - Deadly Dance

Dubbed the 'Black Swan' case, a former ballerina falls in love with a man 30 years her senior, but when their love story spirals out of control, one of them winds up dead.

Episode 9 - Episode 9

Episode 10 - Episode 10