An overlooked detail provides Hart and Cohle with an important new lead in their 17-year-old case.

Marty and the team execute a plan to wrestle Marissa’s family’s media company away from her siblings. Meanwhile, Jeannie encourages Marty to let Clyde out of the doghouse; and Doug and Sarah get tested in their relationship.

Jane’s investigation leads him to join a separatist commune after a U.S. attorney is found dead in Mexico, even though there’s no record of her crossing the border. Also, Rigsby and Van Pelt convince JJ LaRoche to help them discover who is stalking former CBI members.

Things get complicated when Harvey mixes business with pleasure and gets caught between Jessica and Scottie. Painful memories plague Mike as he uses a case to exorcise demons against an old foe, while Louis’ suspicions threaten to expose Mike.

Holmes and Watson consult on a case in which a man suspected of murdering his wife years ago receives a ransom demand for her safe return. Meanwhile, Lestrade overstays his welcome at the brownstone and seems unwilling to leave.

Old feelings and jealousies arise at a Presidential event causing Fitz to face a harsh reality. Meanwhile, Quinn tries to prove herself to B613 and Leo Bergen sets up a meeting between Sally and an old friend.

Dean Pelton lets two designers test their new social networking application at Greendale, leading to a war among the students; Professor Hickey decides to go underground until the battle ends.

Cameron feels competitive when a popular teacher returns from sabbatical; Haley goes to a realtor’s banquet with Phil; Mitch struggles to get his bearings at his new job; Jay and Gloria babysit Lily.

Oliver is shocked when he learns that Slade has come to Starling City. Back on the island, as Oliver, Slade and Sara prepare to take over the freighter from Ivo, Sara pulls Oliver aside and tells him he needs to kill Ivo to prevent him from telling Slade what happened with Shado. Oliver feels immense guilt over the situation but realizes Slade’s growing rage from the Mirakuru makes him unpredictable and he could turn on his friends if he thinks Oliver is to blame. Oliver agrees to kill Ivo and the battle begins.

Brick makes it hard for Mike to relax during the vacation he was forced to take; Frankie is furious when she learns that Axl was in town without letting her know; Sue tries extra hard to please her customers after receiving a bad review.