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Triangle is the third episode of the sixth season of The X-Files, and the one hundred twentieth episode overall.
Guest Stars: Issac Charles Singleton, Jr. (1st Roughneck), William B. Davis (Cigarette Smoking Man), Chris Owens (Special Agent Jeffrey Spender), Mitch Pileggi (Assistant Director Walter Skinner), James Pickens, Jr. (Assistant Director Kersh), Madison Mason (Captain Yip Harburg), Trevor Goddard (1st British Crewman), G.W. Stevens (2nd British Crewman), Greg Ellis (3rd British Crewman), Nick Meaney (4th British Crewman), Kai Wulff (3rd Nazi), Tom Braidwood (Frohike), Dean Haglund (Langly), Bruce Harwood (Byers)