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Paul and Kawa investigate a UFO crash site in Argentina and eyewitness accounts of mysterious men in black; Sarah and Nick track a pattern of low altitude UFOs in Phoenix and a 1947 crash with secretive connections to Roswell.
Link analysis patterns lead Nick and Sarah to a site where they uncover ancient evidence of human contact with aliens; investigating Argentina's most credible military encounter, Paul and Kawa track down an eyewitness and the presence of NASA.
A Kansas eyewitness reveals photographic evidence of a UFO landing site, leading Nick and Sarah to a groundbreaking discovery. Paul and Kawa disprove an official government account of a meteor impact, and track down a pilot who faced a hostile UFO.