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Vaughn and Sydney, searches for Vaughns father, and the word Nightingale. Getting help from her father, telling him that Vaughns father might still be alive. Jack Bristow and Sloane have their own agenda. Following Jack Intel, Sydney and Vaughn goes to Munich. Dressed as a German beer maid, Sydney roughly pursued an investment banker to give her information. They find out that Nightingale is still an active experiment, in an atomic plant in Siberia. They go on a mission to the plant. Which turns out to be very dangerous for both Sydney and her father. Written by Byzentia
All Episodes - S04
EPS01
Five months later. Sydney quits the CIA and joins a Black Ops unit called Authorized Personnel Only alongside Dixon, Jack, Vaughn and... Sloane whom for limited immunity ...
EPS02
Sydney unwillingly teams up with her father to hunt down a modern-day samurai, named Kazu Tamazaki. Meanwhile, Nadia is back home in Argentina and refuses to go back into ...
EPS05
Sydney and Vaughn go undercover as an arms dealing married couple in a mock-up setting of American suburbia to find a stolen electro-magnetic pulse weapon that when deton ...