Laurel Lance (Katie Cassidy) enlists the help of a computer guru to dig up dirt on Sebastian Blood (Kevin Alejandro) in a scene from tomorrow night's episode of Arrow, "City of Blood". Although it isn't exactly legal, Laurel finds evidence that Sebastian knew Slade Wilson/Deathstroke (Manu Bennett) was going to kill Moira Queen (Susanna Thompson). What will the Starling City District Attorney do with this information? Find out when "City of Blood" airs Wednesday, April 30 at 8 PM ET on The CW.

After Slade threatens to take everything Oliver loves away, Oliver decides the fastest way to stop further bloodshed is to surrender to his enemy. Knowing that surrender will surely lead to Oliver's death, Diggle and Felicity go to extreme measures to keep Oliver from confronting Slade. Meanwhile, Thea considers leaving town, and Laurel resumes her crusade against Sebastian Blood. Finally, Slade unleashes his assault on Starling City.