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.

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.

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

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.

Coulson and May uncover startling information about Skye’s past, while the team is swept into a storm at S.H.I.E.L.D. Academy.

The murder of a young video store clerk takes a strange turn when the team discovers his past history as a high-level hacker. But it’s nothing compared to the shock Castle receives when their investigation leads them straight to his father, Jackson Hunt.

In an attempt to deliver a devastating final slap to Barney, Marshall explains how he mastered the Slap of A Million Exploding Suns.

During an investigation into a suicide bombing at the U.S. Marine base, a discovery is made about a new, chemically undetectable bomb material; Gabriel is unable to finish a task.

Alicia and Will each represent one half of a couple accused of smuggling drugs, but the courtroom becomes mired in confusion and legal technicalities when they insist on separate jury pools. Meanwhile, Cary attempts to woo a Lockhart/Gardner client, Kalinda tries to repair a damaged relationship and Marilyn begins her investigation into possible voter fraud during the gubernatorial election.