A good episode! A sketchy mission of Liz and Phil dealing with a deadly passagens! Stan and his K G B equivalent have major plot twist where Stan's investigations blend into Liz and Phil's mission. A education episode of events, and dealings with the military and germ warfare. Could such events happen during cold war? Possibly could! The direction, characters, and feel of Persona Non Grata episode is so real. The Paige dealing with the realization of being a K G B puppet becomes personal baggage dead story time! A strong seasonal final! Eight out of ten stars.