To prevent nuclear weapons from being launched from a secret U.S. nuclear silo, the team has to prod the memory of their only hope, an injured former Secret Service agent. Drew proposes that moving to Maine might be best for Ralph.moreless
After several months of silence, the Machine sends a new Number to Reese and Sam... and Finch, who ignores the call. Meanwhile, Fusco gets a new partner and Elias receives an unexpected visitor.moreless
When a high-tech map maker is murdered, Jane and the FBI investigate the possibility that he may have unearthed a spy ring before he was killed. Elsewhere, Rigsby and Van Pelt are caught up in a disturbing conspiracy.moreless
An assassin attacks Queen Manor in an attempt to kill Black Canary, who has taken refuge there with Oliver's help. Meanwhile, Moira is reluctant to make a guilty plea despite Thea's advice, and Oliver is furious when he discovers that Laurel will be prosecuting his mother in court.moreless
When the CIA discover that MI6 are spying in their country, they send Annie to be recruited.
An undercover agent hands over new evidence to Carrie who is keeping an eye on the surveillance footage of Brody's home.