Oliver discovers that Slade is alive and intends to get revenge for Oliver's actions against him on the island. Meanwhile, in flashback Oliver and Sara prepares to take the Amazo, but Sara tells Oliver that he must kill Ivo to keep the doctor from revealing to Slade who is responsible for Shado's death.moreless
After a battle with Cyrus Gold, Oliver is poisoned and left for dead, and Felicity gives him an antidote that causes hallucinations of his past. Meanwhile, Brother Blood captures Roy, Barry continues assisting Felicity, and Lance loses someone when he tries to run surveillance on Cyrus.moreless
A deadly illness sweeps through Starling City. When Diggle is struck down, Oliver confirms that the source of the illness is a new version of Vertigo. Tracking down a lead, Felicity is soon captured by The Count, who has escaped prison. Meanwhile, Moira fights for her life in the courtroom against a death sentence, and Laurel is forced to prosecute her when DA Donner is stricken down by the same illness.moreless
An assassin attacks Queen Manor in an attempt to kill Black Canary, who has taken refuge there with Oliver's help. Meanwhile, Moira is reluctant to make a guilty plea despite Thea's advice, and Oliver is furious when he discovers that Laurel will be prosecuting his mother in court.moreless
Marta agrees to wear a wire to help build a case against Schiller. Schiller is amazed at Marta's business sense and as she dips in deeper to his business, she finds herself working with a woman who has a long history with Schiller.moreless
With the killer seemingly caught the team believe the case is closed, when another woman is found dead matching the m.o. of the serial killer. Sarah unwittingly becomes the target of the real killer.moreless
In part two of the two-part Season 3 opener, Will is still suffering from amnesia concerning his near-death encounter with Kali. However, he continues to be plagued by blackouts and visions - and it appears that sinister elements are intent on "helping" him unlock his memory.moreless
Shawn and Gus investigate a man who has disappeared from a local retirement community.