Link analysis uncovers a correlation between UFO sightings and secret government sites, so Nick and Sarah follow a lead deep underground. Paul & Kawa track UFO reports to a secret atomic site in Argentina, and a former CIA witness breaks his silence.

Secret documents from a military investigation lead Myke and Dr. Livingston to recordings of "fast movers" by the US and Russian Navy. As link analysis flags an encounter with a US Supercarrier, Sarah and Nick hunt down the holy grail of eyewitnesses.