The X-Files
This is Not Happening (1) (8x14)
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When Teresa Hoese (who Scully and Mulder met just before Mulder's abduction) is found in a desert after enduring alien testing, Doggett alerts Scully that this could have something to do with Mulder and his whereabouts. Skinner joins them and they travel to the hospital where Teresa is clinging to life by a thread—and Scully soon realizes this is exactly what's going on with Mulder.