Season 1 Episode 18 Salvation Arrow Episode 18 "Salvation" Photos : Colton Haynes Gets Bloody! 03.14.2013. @ 06:40 ShahbazMalik New spoiler-filled photos have emerged for Arrow, episode 18 "Salvation". Roy gets bloody, more island flashbacks and Laurel's mum sticks around! image gallery View: thumbs list Source: CW Read the official guide for more spoilers. The episode is slated to air Wednesday, March 27.