After learning the latest person of interest (Alan Dale) has connections to Cold War Soviet espionage circles, Reese and Finch learn how covert operations used to be handled.
Lilly Rush interviews a maid who says she witnessed the beating death of a teenage girl during a party on a luxurious estate more than 25 years ago.
After a financial scam destroys the reputation of lawyer Maia Rindell, while wiping out her mentor and godmother, Diane Lockhart's, savings; Maia and Diane join one of Chicago's preeminent law firms.
Having lost a number of essential personnel to Nazir's terrorist plot against the U.S., the CIA issue polygraph tests on everyone who had contact with them. This includes Brody, which Carrie hopes will reveal the truth about him.
Frank takes matters into his own hands to save Gormley's career when complaints against him become public knowledge; Danny and Baez learn to be allies when the transgender community comes under attack.