S8, E14: When Teresa Hoese, the woman Scully and Mulder met the previous spring in Oregon just before Mulder was abducted, is found in a desert, returned from tests done on her by aliens, Doggett alerts Scully that this could have something to do with Mulder and his whereabouts.

Starring Eddie Kaye Thomas, Annabeth Gish, Judd Trichter