Nick and Katrina unlock the foreboding secrets of HMS Shrewsbury Prison in England, facing down over 200 years of executions, anger and tragedy.

Nick and Katrina visit a historic manor in Middleboro, Massachusetts, to determine if it's unsafe for tourists; Katrina investigates hauntings beyond the house; the paranormal activity hits too close to home for Nick.

St Ignatius Hospital in Colfax, Washington, has been abandoned since 2003, but Nick and Katrina soon realise they are not alone in the hospital.

The team seeks out the elusive shadow figures lurking in the Waverly Hills Sanatorium in Kentucky. They use a high-tech kit to catch shocking new paranormal evidence.

The team is called to Ohio to help a bereft mother identify the dark energy forcing her family to flee their home, gaining chilling evidence about the spirit's evil intentions.

In their largest investigation to date, Nick and Katrina spend 72 hours exploring the Statler City Hotel in Buffalo, NY, and discover that the ghostly remains of the hotel's sordid underground history may have no intention of staying buried.