Gabriel’s chip is hacked, leading to him discovering that Mei Chen is still alive and that she possesses a chip even more powerful than his own.

Marty has a confusing meeting with Roscoe’s new crush; Jeannie makes some power moves to win an account with the Department of Defense; Sarah tells Doug that she wants them to have a baby; Clyde witnesses Monica push a junior analyst a bit too far.

Under pressure to land a suspect in the Lange murder, Quesada warns Hart and Cohle that they might be replaced by three detectives from a new task force. The pair lobbies for extra time to follow up on a lead that takes them from a rural cathouse to an incinerated church. With his marriage to Maggie already strained by work, Hart finds respite away from home.

When Neal and Peter go after an assassin, the stakes are raised even higher when they realize this may be the same person who has been pulling Neal’s strings.

A team of investigators has the study group take lie detector tests before they can be considered for distributions from Pierce’s will.

A team of investigators has the study group take lie detector tests before they can be considered for distributions from Pierce’s will.

Gloria has an encounter with a mean mom (Jane Krakowski) during the high school open house; Mitchell meets a judgmental neighbor (Jesse Eisenberg); Alex goes to a therapist.

Sue makes a discovery that leads to an ultimate prank battle with Axl; Brick tries to read a recommended biography on Debbie Reynolds.

Oliver must tackle a new threat to the city when bombs start to go off in Starling City. Felicity discovers the person setting them off is Mark Sheffer, a man who goes by the nickname Shrapnel. Arrow discovers Shrapnel’s next target is Sebastian Blood’s “Unity Rally” and tries to talk the alderman out of hosting it, but he refuses. Arrow sets off to stop the bombing, but Shrapnel tricks him and traps him in a bomb-laced antique store where he is unable to move without setting off the device. While Felicity helps Oliver, Diggle races to the plaza to find the bomb before it goes off. Meanwhile, Roy continues to hide his new strength from Thea but, after she witnesses his super strength in action at the rally, she demands answers. Laurel’s suspicions about Sebastian grow stronger once she learns that he grew up with Cyrus Gold, the man who killed Lance’s partner. After Donner refuses to help her investigate, she turns to Arrow for help.

Monroe finds himself in unfamiliar territory and must make a choice about his son, Conner while Neville and Julia continue to tango at Jason’s dismay. Meanwhile, Gene leads Charlie to an uneasy discovery.