In an age of so many streaming options it can sometimes be paradoxically difficult to find something good to watch. If you’re looking for quality documentaries based on the history of espionage then there are a surprising number of excellent, free choices for Amazon Prime subscribers.

Nikolai Khokhlov was a Soviet war hero and agent selected for a dangerous mission: kill a Russian dissident in Frankfurt, West Germany. Khokhlov went to Frankfurt as ordered, but his actions there shocked his superiors in Moscow, and opened a new chapter in the Cold War.

During WWII, British technicians and engineers developed an incredible variety of weapons and gadgets at Station IX located on the grounds of the Frythe Estate near Welwyn, England. Here are five of the unique weapons they developed for use behind enemy lines.

Among intelligence agencies and clandestine organizations, the High Standard Model HD Military Silencer (MS) is the standard for suppressed pistols by which all others are judged. First adopted in 1944, the pistol remained in the inventory of the CIA as late as the 1990s and possibly beyond.