Following Slade’s return and his promise to make good on his threat to destroy Oliver’s loved ones, Oliver focuses all his energy on preparing for battle with his former friend. Sarah tries to help but, fearing for her safety, Oliver pushes her away. Meanwhile, Diggle is recruited by Amanda Waller and A.R.G.U.S. to stop a warlord he knew from his time in Afghanistan. Always the soldier, Diggle agrees to help. However, he’s not prepared when Amanda introduces him to the rest of the team — Deadshot, Bronze Tiger and Shrapnel, all criminals he and Arrow helped put away. Lyla defends the team and explains the world is a complicated place, but Diggle isn’t sure he agrees. When the mission takes a dangerous turn, Diggle is forced to make a difficult decision.
Why We Fight
While Dr. Porter and Miles venture into Willoughby in search of allies within the town, Monroe seizes an opportunity to surprise the Patriots. Neville’s political maneuverings put him and Jason in serious danger.
The Way of the Ninja
When a Japanese ballet dancer is mysteriously murdered, Castle and Beckett’s investigation into her secret life uncovers evidence that she was killed by a ninja, and now that ninja is coming after them.
Gary Blauman
Gary Blauman shows up at Barney and Robin’s wedding, sending the gang into a frenzy about which table to seat him at. Through their debate, they realize each of them either hates or loves Gary. Meanwhile, in the year 2014, Ted and The Mother go out on their first date.
The Grey Hat
As Riley and Gabriel track an infamous hacker, they learn the suspect may have been set up and a sinister group may be planning a nuclear attack.
Zhang
Marty and the Pod accompany Lukas on a tour through his old neighborhood; Monica seeks help from Kaan and Associates on a new food product; Lex embarrasses Roscoe.
Minute By Minute
Kiera risks everything to stop Alec from altering history in his quest to save Emily, but can the mysterious group Kiera aligned herself with be trusted?
A Few Words
When Alicia is asked to be the keynote speaker at the American Bar Association conference in New York City, she looks to her past for inspiration. Meanwhile, the competition with Diane and Will continues as Alicia and Cary battle to align with a powerful New York lawyer. Also, Will turns to an old acquaintance when it becomes clear that Nelson Dubeck’s investigation into possible voter fraud isn’t going away.
Grey Water
Jane and Fischer investigate a murder at an oil fracking site, while Rigsby and Van Pelt travel to Austin to help investigate suspects in the string of attacks on former CBI team members.
Yesterday's Gone
Both Mike and Jessica lean on Harvey for support when things from their respective pasts throw them off their game.