Meet Otto and Cecil. Two brothers growing up privileged in the Welsh countryside. They enjoy watching nature shows, playing with their pet pony, impersonating their Grandfather...and killing the help. Murder is the family business after all. Downton Abbey, this is not. However, it’s not so easy to continue the family legacy with the constant stream of threats and distractions seemingly leaping from the hedgerow.

Outside the apartment where a wake is going on, the manager of the A&P across the street is robbed. Reverend Short, a storefront preacher addicted to opium and brandy, is watching from a bedroom window in the flat. He leans out too far and falls, but a huge bread basket, sitting outside the bakery below, saves him. Back inside, he says he sees a vision of a dead man. Outside, in the very basket Short landed in, lies the body of Valentine Haines. Who murdered Val? It is up to Grave Digger Jones and Coffin Ed Johnson to find out.

Many Indigenous people believe that one should never whistle at night. This belief takes many forms: for instance, Native Hawaiians believe it summons the Hukai’po, the spirits of ancient warriors, and Native Mexicans say it calls Lechuza, a witch that can transform into an owl. But what all these legends hold in common is the certainty that whistling at night can cause evil spirits to appear—and even follow you home.

Episode Thirteen takes them to every ghost hunter's holy grail: the Paranormal Research Foundation. This brooding, derelict mansion holds secrets and clues about bizarre experiments that took place there in the 1970s. It's also famously haunted, and the team hopes their scientific techniques and high tech gear will prove it. But as the house begins to reveal itself to them, proof of an afterlife might not be everything Matt dreamed of.

Piranesi lives in the House. Perhaps he always has. In his notebooks, day after day, he makes a clear and careful record of its wonders: the labyrinth of halls, the thousands upon thousands of statues, the tides that thunder up staircases, the clouds that move in slow procession through the upper halls. On Tuesdays and Fridays Piranesi sees his friend, the Other. At other times he brings tributes of food to the Dead. But mostly, he is alone.