Skinner later confronts Mulder over the briefcase ( which is now in Scully 's possession ) , the absence of which has caused an international incident with Japan . He refuses to assist Mulder any further with his case . Mulder meets with Senator Richard Matheson , who gives him the details on the autopsy and links it with the larger conspiracy of the alien-human hybrids . Mulder investigates further , discovering that the Japanese scientists were members of the notorious Unit 731 during World War II ; like Victor Klemper , they were recruited by the U.S. government to develop the hybrids . Mulder believes that the scientists killed on the videotape were working on a secret railway , transporting test subjects . After sharing her MUFON findings with Mulder , Scully runs her implant through the FBI labs to gather technological information about it . She analyzes the autopsy video , realizing that one of the scientists seen , Dr. Ishimaru , experimented on her during her abduction . Meanwhile , Mulder goes to West Virginia and tracks down the secret train car , watching a group of Japanese men place what seems to be an alien-human subject on board . Meanwhile , another Japanese scientist , Dr. Shiro Zama , waits for the train at a station in Ohio ; he is forced to board after his bodyguard is killed by the Red-Haired Man in the restroom . The Red-Haired Man follows Zama aboard the train , which is headed for Vancouver , Canada . Mulder tracks the train to the Ohio station , but learns it has just left when he arrives . Meanwhile , Scully goes to Mulder 's apartment and is met by X , who warns her to keep Mulder from getting on the train , as the scientists are aware of his presence . Scully calls Mulder , who has managed to drive ahead of the train and is just about to jump onto it from a bridge . Despite Scully 's pleas , Mulder jumps onto the top of the train as it speeds past below
Unit 731
Unit 731
Nisei (The X-Files)