Episode 9 - The Unholy Spirit (Based on a True Story)  There's more at stake here than just an exorcism of two rather nasty spirits. The fact that both the father and the son are being possessed at the same time suggests that this is more than just a coincidence. Something more dangerous is brewing beneath the surface, an ancient darkness after more than just the lives of a father and son. Can this darkness be stopped before the spirit and the person become one and the same? If that happens, separating the spirit and the host always ends badly. Normally, it would make sense to tackle one spirit at a time, but Te Kani, the paranormal expert, has a gut feeling about these two spirits. He wants to let them face each other.    T.A. Whero