This final Carter film is a lot of fun, with Nick (unwillingly, at first) taking on a ring of Fifth Columnists (since this was filmed before the US entered the war, we're not told the villains are Nazis, but it's
The Man with Two Faces
Mantovani, the King of Strings
Hello...?
Secrets of Palace coup d'etat. Russia, 18th century. Film №1. Testament Emperor