London, 1762. In a cramped house on Cock Lane in Smithfield, knocks and scratches surround an eleven-year-old girl. People say it's the ghost of Fanny Lynes, who died two years earlier. Through one knock for yes and two for no, she accuses the man she loved of poisoning her.

Adam takes the lads through the full story: a forbidden love, a fall-out over money, aristocrats crammed into a Smithfield bedroom, and Samuel Johnson waiting by a coffin in a Clerkenwell crypt for a knock that never comes.

Then there's a small board, a conspiracy trial and a pillory crowd that did something nobody expected. Oz wants evidence, Frank wants justice for a frightened kid, and everyone wants to know who wrote the script.

Plus Frank invents a knock code, and it gets badly out of hand.

The Grave Shift is a Ghost Haunt UK production.

1. A king obsessed with witchcraft. A magistrate determined to make his name. And a nine-year-old girl whose testimony sent her own mother, brother and sister to the gallows. Adam, Oz and Frank go deep on the Pendle Witch Trials.

A single mum, two young sisters, and eighteen months of chairs sliding, Lego flying, and a grown man's voice coming out of an eleven-year-old's throat. Adam, Oz and Frank go through the Enfield Poltergeist case files -- and the real, unresolved argument between the investigators who were actually there.