Season 5 Episode 18 - The Pine Bluff Variant 

Scully fears that Mulder has gone to the other side when she sees him assisting a federal suspect escape custody. In truth he has infiltrated a terrorist group testing a deadly biological weapon that can eat through a person's flesh.
kata kunci: x-files, mulder, scully, full episode, season 5, episode 18, 5x18, the pine bluff variant