After a wealthy couple is murdered, Carrie and Al pose as a married couple to lure in the killer, who Al believes is linked to a series of unsolved homicides he once investigated.
Carrie catches a deadly assassin who has eluded her before, but must put her personal vendetta aside when it's revealed that the woman has vital information to prevent a terrorist attack on New York City.
Carrie believes the investigation of a district attorney's murder is connected to a man who was falsely accused of raping a young woman in the summer of 2000.
Eliot and the mayor are trapped in an elevator by a cybercriminal who threatens to send them to their death, forcing Carrie to work from within the building to thwart his plans.
The Secret Service enlists Carrie and Al's help when a murder investigation leads them to uncover a counterfeiting ring run by an assassin. Boris Kodjoe guest stars.
A young ambitious world news reporter turns up dead the day she breaks a big news story implicating a high ranking official in a sex scandal. Carrie and Al both use their connections in high places to access information.
When Carrie recognizes a murdered city official as someone she played poker with at an underground casino, she puts her career on the line by admitting her illegal activities and volunteers to go back to the tables undercover.
Carrie and Al investigate when Elliot's old friend is found dead after a charity event they had all attended. Elliot has trouble in his marriage, and old secrets come out about his "3 amigos" days as a young employee of the mayor's office.
Carrie and Al's investigation into the death of a college dropout takes a surprising turn when they discover he had been living in an off-the-grid community on an abandoned island near Manhattan.
Carrie and Al investigate the murder of a high-end matchmaking service employee, but each secret they uncover in the victim's life only serves to create a new possible suspect and motive.