Season 1 Episode 10 - Fallen 天使 

When a tract of lonely woodland is cordoned off between laser fences, and rapidly changing explanations are rampant, Mulder's curiosity carries him beyond the bounds of official jurisdiction-and into the middle of a UFO cleanup.
密码: x-files, scully, mulder, full episode, season 1, episode 10, fallen 天使, 1x10