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
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.