When you watch Arrow Season 3 Episode 15 online you'll be treated to Felicity and Ray Palmer working togeth with the A.T.O.M. exosuit and engaging in a little extracurricular activity. Will ATOM make a little fly-by before morning? Who knows? Elsewhere, Thea decides to take things into her own hands, but Oliver doesn't want it to happen. He wants to save her soul. Is that really all it is? Diggle isn't so sure and is reluctant to let him go it alone. Is a trip to Nanda Parbat imminent? You betcha! Find out all about it when you watch Arrow online!