Susan Bain

The agents assist Mulder's former mentor with a case involving a serial killer who claims to be possessed by a demonic force.

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 to help them in their search for Cleopatra, but only if Danny is able to get his incarcerated father to give up the location of paintings that he helped steal 20 years earlier; Farouk deals with a loose end.