Susan Bain

Mulder and Scully explore the thin line between sanity and madness when they track a serial killer who claims to be possessed by an evil spirit.

After a series of paranormal deaths occur at a Mexican migrant camp, Mulder and Scully go on the trail of a mythical blood-sucking creature known as "El Chupacabra."

The FBI offers Danny and Lexi information that will help them in their search for Cleopatra, but only if Danny is able to get his incarcerated father, Patrick (Mark Valley), to give up the location of paintings that he helped steal 20 years earlier. Also, Farouk deals with a loose end and takes a big step forward in his master plan.

A man with a sleepwalking disorder is suspected in a series of murders in a small town.