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.

Relationship guru Nadia Essex, Lateysha Grace from 'The Valley', and 'Love Island' winner Amber Davies join Rylan to uncover the secrets of London's New Wimbledon Theatre, while 'Ex on the Beach' alumnus Charlotte Dawson has a personal connection to unravel.

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.