Former CIA agent Bob Baer launches a global investigation into assassin Lee Harvey Oswald and the murder of President John F. Kennedy. Bob makes a staggering discovery: a declassified CIA document reveals that Oswald met with Soviet officials in Mexico City only six weeks before the assassination.

CIA veteran Bob Baer turns his attention to Moscow, exploring deeper connections between Oswald and the Russian government. The team tracks down a former KGB officer, whose stunning testimony jolts the investigation.

Bob and his team focus their efforts on Louisiana, where Oswald lived in the months prior to the murder of President Kennedy. Reconstructing Oswald's timeline in New Orleans, the team uncovers a "dark period"...weeks where no one can account for his whereabouts or activities.

As the investigation into Lee Harvey Oswald heats up, newly declassified government files reveal that Oswald may have been involved with an underground operation in the swamps of Louisiana, training with mercenaries and violent extremists only months before the assassination.

CIA veteran Bob Baer's investigation into assassin Lee Harvey Oswald returns to the scene of the crime: Dallas, Texas. Examining Oswald's every move in Dallas, Bob looks to prove that Oswald had help in his mission.

Bob retraces Oswald's every step in Dallas, attempting to reconstruct his planned escape after the murder. Examining the getaway route, Bob makes the most unbelievable discovery yet. The team ventures into international waters to pressure test their findings - confirming new evidence that could rewrite United States history.

Bob Baer examines the most shocking documents the federal government released related to the assassination of President John F. Kennedy on October 26, 2017 and reconciles discoveries he's previously made.

Exclusive access to a woman who has remained undercover since JFK's assassination.