Season 2 Episode 17 - End Game (2) 

The alien bounty hunter kidnaps Scully and wants to trade her for Mulder's sister, who is revealed to be a clone herself. After the trade goes badly and Mulder discovers the truth about Samantha.
الفاظ مطلوبہ: x-files, mulder, full episode, scully, season 2, episode 17, end game (2), 2x17