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Strange occurrences are afoot in East Sussex, England, as Trevor Collins joins the cast as "The Trapper" in search of several wandering spirits including a WWII soldier, two ghosts who are lamentably linked and a heartbroken mother known as the Grey Lady.

After a tense encounter with a door, the team raises the stakes by tying Trevor down in hopes of luring out the Grey Lady. Meanwhile, Geoff imitates Thomas Sackville in the hopes of scaring Rosie and Jeremy receives a cryptic message.

The team travels all the way to Melbourne, Australia to investigate the tragic story of Elizabeth Scott, a malevolent spirit that inhabits Cell 17, and the infamous outlaw, Ned Kelly.

Undeterred by the freezing weather in Jackson, California, the Haunter team uses new techniques to communicate with the fallen men of the Kennedy Mines. While Ryan and Jeremy have trouble with spirit boxes, Geoff faces his fears of heights.

In the biggest stunt of the series, the team digs deep and ratchets up the fear, forcing Gavin into an uncomfortable situation.

Our intrepid explorers must navigate their way through the USS Hornet, a World War II era aircraft carrier and haunted attraction. The labyrinth of steel is filled with the spirits of injured soldiers, dead sailors who had their blood boiled and even a tragic suicide.

The team travels to one of the largest insane asylums known for lobotomies and electroshock therapy. They will search for the spirits of neglected children, abusive nurses and attempt to lure out Dr. Fear. Yes, that’s his real name.

In the climactic conclusion, the Haunter team explores the infamous Candy Land and dangerous underground tunnels. And, in a surprising twist, the infrasound machine reveals a new tactic.

Full of bonus, never-before-seen footage, deleted scenes and more, the Haunter cast sits down with director and co-creator Daniel Fabelo to discuss this season's most ridiculous moments and review some of their most haunting evidence.