Bob Baer and Dr. John Cencich continue their investigation into the death of Adolf Hitler by sending teams into three countries: Germany, Spain, and Argentina. Lenny DePaul and Sascha Keil find a never before discovered tunnel leading from Hitler's bunker directly to Tempelhof Airport where Hitler's personal plane awaited. Tim Kennedy joins a team of elite marine archeologists to search for a possible German U-Boat off the coast of Argentina. Lenny joins Gerrard Williams to investigate if Hitler could have arrived in Spain and remained hidden with the help of Spanish dictator Francisco Franco. The team investigates a secret U-boat docking station that could have aided Hitler's escape from Europe; also discovered is a sunken sub near Caleta de Loros.