London's largely disused Post Office Railway runs some seventy feet below the city's streets, where an on-theme Charlotte from Ex on the Beach joins Love Islanders Marcel and Gabby to scour the damp, dark tunnels for evidence of the paranormal.

The team explore 120-year-old disused tunnels hidden deep underground in the Kent countryside, where there have been many reported spooky sightings, including ghostly figures and a phantom black dog.