A copycat killer who goes by the name “The Trickster” starts setting off bombs in Central City. In order to stop the villain, Barry and Joe meet with the original Trickster, a criminal mastermind named James Jesse, who has been imprisoned for 20 years. Things quickly go from bad to worse when the Tricksters unite and take Henry prisoner. Meanwhile, Iris asks Eddie for help with a case and flashbacks show how Harrison Wells came up with the idea for the particle accelerator.
The school board invites the Dean to become a member as long as he promotes his “homosexuality.” Chang auditions for “The Karate Kid,” with Annie’s help, and endures abusive treatment from the director. Abed tries to save baby birds nesting on the Greendale Internet router with the help of Elroy.
Chuck urges Jimmy to accept a harsh truth. Meanwhile, a deal threatens to go off the rails when Mike’s ability to complete a job is called into question.
When Richie “The Pitbull” Falco, a larger-than-life personal-injury attorney is found dead, Beckett and Castle investigate the many clients and competitors who had motive to kill him. But the mystery deepens when they discover a shocking secret that may be linked to Richie’s murder.
The partners of Florrick/Agos/Lockhart find themselves at odds when they voice different opinions regarding the company’s future. Also, the firm falls victim to a cyber-hack after it takes on the case of a movie producer whose work is pirated on a peer-to-peer sharing site.
Concerned about repercussions from Denna, Marty looks to secure his place at K&A. Jeannie receives an exciting proposition. Clyde reaches out to his father, and Roscoe is at the center of an ugly incident at school.
Marty is on the verge of making K&A one of the biggest players in the business, if he can persuade his employees to stay. Jeannie gives birth. Clyde, Doug, and Kelsey await an offer – and Roscoe faces the consequences.
Spring break has Claire doing some spring cleaning, while Phil struggles with not being a spring chicken when Luke starts outperforming him at seemingly everything. Haley takes Alex to a music festival to take her mind off of colleges, and Gloria and Jay challenge one another to give up Spanish soap operas and cigars respectively. However, when Gloria accompanies Cameron to his faculty talent show, she projects the soapy drama she craves onto Cam’s rivalry with Senor Kaplan, and Jay tags along with Mitchell to pick up Lily from camp so he can sneak a smoke.
It’s celebration time as Diggle and Lyla get married. However, Deadshot interrupts their honeymoon, and tells them the Suicide Squad has been given a new mission — rescue United States Senator Joseph Cray from a hostage situation in the Republic of Kasnia. Amanda Waller breaks down the mission and introduces them to the newest member of the Suicide Squad, Cupid. Meanwhile, Oliver learns about Ray’s new Atom costume and the two have a heated stand-off. Felicity and Ray hit a rough patch.
Frankie nervously waits to see if Sue got into any of the many colleges she applied too.