The CW have released a series of promotional photos for next week's episode of Arrow, titled "City of Blood." The episode sees Oliver and Laurel facing off against Brother Blood, whose "masked lunatic" identity has once again usurped his mayoral aspirations as the driving force behind his character since Thea's kidnapping and the subsequent sympathy factor that catapulted Moira Queen into the lead in the race. Now at the head of Deathstroke's Mirakuru Army, Blood once again has something to fear from Laurel who, back at the District Attorney's office, is once again pursuing her suspicions about him -- this time apparently in a more Arrow-centric way. Of course, based on the preview text for tonight's episode, they'll be doing all of this without Team Arrow's own Mirakuru-fueled muscle, Roy Harper. "City of Blood" airs next Wednesday, April 30, at 8 p.m. EST on The CW. You can check the photo gallery out, along with the official episode synopsis, below. ARROW "City of Blood" — (8:00-9:00 p.m. ET) (Content Rating TBD) (HDTV) OLIVER CONSIDERS HIS OPTIONS AGAINST SLADE — After Slade (Manu Bennett) threatens to take everything Oliver (Stephen Amell) 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 (David Ramsey) and Felicity (Emily Bett Rickards) go to extreme measures to keep Oliver from confronting Slade. Meanwhile, Thea (Willa Holland) considers leaving town, and Laurel (Katie Cassidy) resumes her crusade against Sebastian Blood (guest star Kevin Alejandro). Finally, Slade unleashes his assault on Starling City. Michael Schultz directed the episode written by Holly Harold (#221).