Plot Synopsis

Using classic suspense film techniques, first-person accounts from friends and families of the victims, and expert commentary from local authorities, true-crime experts, and psychologists, YOUR WORST NIGHTMARE is a one-hour series that chronicles some of the creepiest, most harrowing crimes ever committed, as these victims' darkest dreams become unfathomable realities. Each 60-minute episode tells the story of a different victim, including: Sandy Jeffers, a 25-year-old completing her master's degree in forensic anthropology, who, being unknowingly followed for months, finally comes face-to-face with her stalker when he breaks into her house and kidnaps her; high-school student Cassie Jo Stoddart, who's housesitting in Pocatello, ID, when her weekend turns into a real-life horror movie, as unexpected visitors terrorize the home; Martha Brailsford, who didn't return to shore during a sailing trip out of Salem, MA; teenagers Todd Schultz and Annette Cooper, who went for a romantic walk one evening in Logan, OH, but never returned -- only to be found dead 10 days later -- in a case that remained unsolved for 25 years; the parents of Matthew Heikkila, who were killed by their son in their Basking Ridge, NJ, home; and Janet Overton, who was weak, tired, confused, and deathly ill, dropping dead in her own driveway in Dana Point, CA.

Season 2 of YOUR WORST NIGHTMARE premiered on Wednesday, November 11, 2015 at 9pm ET/PT on Investigation Discovery, immediately following back-to-back (7-9pm) encore episodes. In the season opener, "Bump in the Night," Annie and Jessica Andrews perform a seance to see if they can contact the spirit of their mother. Soon after, strange things start happening in the house.

On Saturday, December 3, 2016 at 10pm ET/PT, Investigation Discovery premiered the third season of YOUR WORST NIGHTMARE. In the season opener, "Primal Instincts," it's Mother's Day and first-time mom Tennyson Jacobson is looking forward to celebrating with her family. But when she spends her daughter's naptime fighting off a violent intruder, Tennyson can't shake the feeling he'll soon be back to strike again.

Investigation Discovery premiered the fourth season of YOUR WORST NIGHTMARE on Saturday, December 2, 2017 at 10pm ET/PT. In the season opener, "Every Step You Take," college dancer Jodi Sanderholm has spent weeks practicing her team's big performance. So when she vanishes hours before the event, it doesn't make sense -- until a friend comes forward with strange details about the days leading up to Jodi's disappearance.
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YOUR WORST NIGHTMARE returned for its sixth season on Monday, July 6, 2020 at 10pm ET/PT on Investigation Discovery. In the season opener, "No End in Sight," Debbie Puglisi is enjoying life with her husband of nearly 25 years, Nino, in their new dream home. But when an unexpected visitor drops by the neighborhood, Debbie's whole world becomes her worst nightmare in a matter of minutes.