After going over the results from Sapphire's ghost box session, the team meets with Karen and reveals everything they know about the evil they've encountered.

The team investigate a cursed castle in Glencoe, where Clan Campbell murdered over 30 MacDonalds in cold blood as they slept. Can they survive the night?

Comlongon Castle and Hotel is known for its infamous white and grey lady ghosts. Gail and Chris attempt to communicate with these tortured women.

Steve and Amy investigate potential violent paranormal activity that is terrorizing a vulnerable mother and her young child. What will they discover?

A jury convicts a woman of murdering her husband as he lay in bed, but her children insist it was suicide. They reach out to Chris and Fatima to get to the truth.

Michelle disappears, and soon after her abandoned car is found. But has she been abducted, or is she on the run from the law?

In Yorkshire, PC Fletcher's dog Patto has been injured chasing a burglar. In Merseyside, PC Harris and his dog Kane are trying to track down the driver of a stolen car.

PC Bartley reminisces about his first dog, who was killed in action chasing a gang of burglars. Sniffer dog Lucy is called into action when a driver is stopped.

PC Gayles and his dog Thor are on the hunt for evidence to convict mobile phone thieves. In Glasgow, sniffer dog Eddie carries out his first search for a gun.

In Merseyside PC Bartley and his dog Chico are involved in a high-speed car chase. And, new explosives detection dog Pip is at Aston Villa football ground.

Ohio biker Richard Beasley values family, faith and helping others. When he vanishes, police find an online monster has been luring local men to their deaths.

In Pennsylvania, Kevin and Joanne Dowling like to capture their kids' milestones on video. But when a woman in a nearby town is shot dead, Kevin is accused of murder.

In Albuquerque, Mike Snyder starts a family with his partner, capturing it on home video. But after being diagnosed with a serious illness, he vanishes.

In California, an intruder brutally attacks and kills Joan Dawley. Secret home movies uncover a shocking tale of deceit, and a monster lurking behind the scenes.

An unthinkable crime cuts short a family man's quest for a better life in Florida. To find the culprit, detectives must unravel a deadly web of deception.

A religious community mourns an elderly couple when they are murdered in their home. Investigators uncover a web of lies and wicked desires.

When Kathryn is brutally murdered in her home, the residents of her neighbourhood are stricken with fear. Can a pair of shoeprints lead them to the perpetrator?

When beloved wife and mother Starr Harris is savagely murdered in the woods behind her home, the trees hide more than just the killer's identity.

A woman must face the hellish truth about her troublemaking son when he commits a monstrous crime. How much can a mother's love for her son withstand?

People thought Jack "Roy" Spillman was just a man with an odd hobby. But then they learned his hobbies were far darker than they could ever imagine.

When investigators accuse cast members of murder, co-stars replay past scenes and realize they are in the presence of evil.

Paul Bernardo and Karla Homolka are married. When schoolgirls Leslie Mahaffy and Kristen French are found dead, Homolka tells police Bernardo is responsible.

Karla Homolka reveals that her husband Bernardo recorded videos of his crimes. Despite an exhaustive search, police are unable to locate the videotapes.

Paul Bernardo's lawyers find the videotapes of the assaults on Leslie Mahaffy and Kristen French. And prosecutors make a controversial deal with Karla Homolka.