After a man is mysteriously murdered in a park, Castle and Beckett team up with a competitive, high-powered female detective from Hong Kong, who has information about the victim. But as Beckett digs deeper into the case, she realizes neither her Hong Kong colleague nor the victim may be quite who they seem.
When Frank Prady decides to go after Governor Florrick as a campaign tactic, Alicia is faced with the decision of whether or not to attack Peter’s record as well. Also, when Florrick/Agos/Lockhart take on the case of a man paralyzed by a malfunctioning gun created on a 3D printer, they call on Kurt McVeigh to testify as an expert witness, which leads to a rift between Diane and her husband.
Marty butts heads with a turnaround artist sent by Denna to grow K&A’s business; Jeannie receives a dinner invitation to the Kaan home; Clyde reaches a breaking point with his father.
The journey to the City of Light continues, and Jaha makes a move that shocks Murphy. Clarke receives help from an unexpected source, a visitor surprises Octavia, and Lincoln gets his revenge. Meanwhile, at Mount Weather, Cage moves forward with his mission and Bellamy and the group struggle to break free.
Coulson and team come to the aid of a confused Lady Sif, who has lost her memory after fighting with a mysterious warrior whose true mission will send shockwaves through S.H.I.E.L.D. Meanwhile, Bobbi and Mack continue to hide their true mission from everyone close to them.
Mike’s tragic past comes back to haunt him, and he’s forced to seek help from an unusual source. Meanwhile, Jimmy’s moral compass is put to the test.
Alicia prepares for a key interview which could impact the outcome of the race for State’s Attorney. Also, Louis Canning pressures Florrick/Agos/Lockhart to agree on a settlement in his wrongful eviction case against the firm.
Marty and Jeannie entice Denna with a retaliatory business move against Ellis. Meanwhile, things get complicated between Doug and Kelsey; and Clyde spends time with his father and is disturbed to see how similar they may be.
When SEC investigator Sean Cahill fails to link his corrupt boss Eric Woodall and corporate raider Charles Forstman, Harvey must revisit his own uncomfortable past in order to find a way to put them away for good. Mike and Rachel confront the fact that, while Rachel is Harvey’s associate, Mike is his guy. And Donna helps Louis with an unexpected crisis.
Clarke and Lexa prepare for battle, while Raven and Wick experience a major setback. Meanwhile, Octavia and Lincoln are each forced to make a difficult decision. At Mount Weather, Jasper and Maya witness a horrible act, Bellamy follows through on a promise and Cage goes public with powerful information.