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Jack and Katrina investigate a California hotel that's been losing staff due to paranormal activity. They find the property has ties to a nefarious secret society.

The team experience extreme terror when they visit Hilo, Hawaii. They investigate rumours of voices from the underground - what will they discover.

Kentucky's Octagon Hall is known for its paranormal activity, but the activity has now seemingly turned violent. Staff and guests are scared out of their minds.

Steve and Amy investigate a frightened woman's claims that decades of paranormal activity in her Tonawanda, New York, home have now become dangerously violent.

Police find a giant sword bent in half and a victim who has been savagely murdered. Investigators sort through a complicated life to find this killer.

After a loving mother is murdered inside her own home, police focus on their two best clues - a blood-stained hammer and a dusty footprint.

Harold Shipman was a much-loved doctor. Millions watched the GP speaking on TV discussing the benefits of care, not knowing he'd already killed dozens of patients.

Eight-year-old Jamie Lavis was on the bus Darren Vickers was driving before he disappeared. Vickers joined the hunt and spoke on TV - but was hiding an awful truth.

When 15-year-old Becky Stowe mysteriously disappears, everyone she knows is a suspect. It'll take a surprising tip to finally bring the truth to light.

When career-woman Joan Bent is found murdered, police have no shortage of suspects. But when a clue is discovered, no one can believe the identity of her killer.

In 2013, 22-year-old Amber Bass was shot dead in her own driveway after a night out. Was this just a random act of violence or was a jealous lover involved.

When Police Investigator Jim Horton interviews Gary Evans, he makes an unlikely friend of the infamous burglar. But is their bond built on trust or treachery.

Two friends form a financial partnership to make money. But when one partner's gun collection is used as collateral, it leads to a bizarre and grizzly murder.

When Sueanne Hobson weds a widower with a son, life seems perfect. But her relationship with her stepson is in such turmoil that she decides to make him disappear forever.

In 1980, a college freshman never returns after a night out. Police followed her trail to a mysterious lake house but 40 years later they still have no answers.

In Dallas, Texas, surgical patients were falling victim to a monster with a medical degree. An investigation showed Dr. Christopher Duntsch was to blame.

In 1998, 23-year-old Amy Bradley goes on a family cruise through the Caribbean. After a night out dancing in the ship's disco, she vanishes without a trace.

When Tyarra Williams vanishes, tips suggest she may have fallen prey to human trafficking. Does someone in the community know more than they're letting on.

Roger Harris and his wife Donna built their dream home in Florida, but just after the birth of their second son, a vile secret threatens their sweet, simple life.

Building Is Full of Snakes! Ben Renick is a world-renowned breeder of exotic snakes. He's not even 30 and he seems to have it all - until someone he loves hatches a venomous plot.

Angela Samota is smart, beautiful and always the epicentre of every room she's in. But one day she is noticed by the wrong person, and it leads to her gruesome end.

When Mandy meets Paul online, he quickly moves to Kentucky so they can marry. But love soon turns to hate when his controlling behaviour turns murderous.

Las Vegas teen Wendy Mazaros survives sex trafficking and marries her older boss, Tom Hanley - only to discover he is involved with the mob and might be a hitman.