Return to Lian Yu with the Arrow Season 5 finale photos Following the trailer released this morning, The CW has debuted the first batch of photos for the Arrow season five finale! Featuring the return of Deathstroke, Nyssa al Ghul, Captain Boomerang and more villains than you can shake a quiver at, you can check them all out in the gallery below! RELATED: The Arrow Season 5 Finale Trailer is Here! Titled “Lian Yu,” the infamous “island” from the series, the episode is set to air May 23 and is officially described as follows: “The battle between Oliver and Adrian Chase (Josh Segarra) culminates in a final epic battle on Lian Yu.