Tim and Gerrard discover a militarized Nazi compound deep in the jungle of Paraguay; and Mike and Lenny explore a Nazi concentration camp in Chile before an anonymous source leads them to Hitler's last will and testament.
A long-range seaplane that shuttled Nazis all around the continent is uncovered at a lagoon in Uruguay. Tim and Gerrard convince an informant in Buenos Aires to share a cache of documents that could unravel the Nazi network "Die Spinne."
Mike and James excavate the grounds of a remote Alpine hotel in search of buried Nazi dead drops, while Lenny and Gerrard visit Rome and make a discovery that implicates some powerful people in the world.
A hydroelectric plant in Norway where the Nazis were close to producing a nuclear weapon is explored by Tim and Gerrard. Mike and James investigate a cabin high in the Austrian Alps where Hitler's associate made a sacrifice.
In the Season 3 premiere, Bob Baer recruits one of the world's most foremost terrorist targeting officers, Nada Bakos. Enacting a new hunting strategy so effective it has lead to the capture of Osama bin Laden, the team uncovers two planned escape routes for Hitler out of Germany, one to the North and one South. Along the southern route, Tim and James discover a vast tunnel system under Hitler's home.