The team congregates at their usual hotspot in North California, but a huge thunderstorm threatens their experiment; Russell makes a shocking discovery.
Eyewitness accounts suggest Bigfoot is fiercer than previously thought; new DNA evidence suggests the Yeti may not only come from an otherworldly source.
Amy and Steve help a distraught couple trapped in a web of supernatural activity in the hopes of containing the dark energy that has overtaken the home.
A restaurant owner worries that evil spirits are targeting her business in South Carolina, so she asks Steve and Amy for help in addressing the spirits.
The group travels to a Texas town to investigate one of the most haunted hospitals in America; Chelsea finds a haunted doll room; pent-up energy is released.