Zak and the guys revisit their intense investigation of a shuttered juvenile detention center in California. The crew questions whether to continue their dark mission as they confront the lost souls imprisoned within these walls.

Zak and the guys recall their unique investigation of a Utah pizzeria plagued by an evil witch's curse. The crew gets a violent response when they try to draw out a demonic entity in the basement.

Zak and the guys revisit their investigation of an abandoned Washington hospital. They encounter an aggressive energy as they navigate the haunted corridors.

Zak and the guys revisit a case that hit a little too close to home when they answered a desperate call for help from Aaron's dad, Don.

The team look back at their investigation of satanic activity in a Texas hotel. It's one of their top pieces of poltergeist activity ever captured on camera.

The guys revisit their Wild West adventure in a California mining town. They braved a cliffside trail to confront the lost souls that haunted the secluded settlement.

For decades, the Cecil Hotel has been haunted by serial killers, suicides, devil worship and unexplained deaths. Now, for the first time ever, the Los Angeles landmark is allowing cameras inside for a paranormal investigation of ghostly proportions.

Zak and the guys pull back on the curtain on their investigation of the infamous Los Angeles hotel. The crew is given unprecedented access as they attempt to unravel the mysterious death of Elisa Lam.

Zak and the guys look back at an extremely disturbing investigation of a family home in suburban California; strong demonic activity and a satanic message sent through a child's toy makes this one of the most intense lockdowns for the crew. 

Zak and the guys look back at their historic investigation of a mysterious canyon located in the Four Corners region of New Mexico; the crew recalls how they were unknowingly drugged while chasing down skinwalkers in the desert. 

Zak and the crew rush to help a Nevada family who claim paranormal activity sent one parent to the hospital, and fear their young daughter is next. The team works urgently to uncover the dark source of the psychological attacks hiding inside the home.

The guys don their Hawaiian shirts and break out the ukulele as they look back at their investigation of a haunted island off the coast of Los Angeles.

Zak and the guys recall one of their scariest moments as they look back at their investigation of a Utah mansion soaked in tragedy and bloodshed.

Zak and the guys revisit their investigation of the world-famous comedy club in Los Angeles. Fear and laughter go hand in hand at this iconic paranormal spot.