As mentioned, it was revealed in this episode that Ray had been captured by Star City's new resident sociopath, Damien Darhk. It was nothing personal, and indeed Darhk didn't really want Ray all that much. He wanted his suit, and more specifically the technology it uses. We already know that Darhk has some big, nefarious plan for Star City, but we don't know exactly what it entails, and we didn't previously know that he was intending to use Ray's technology as part of it. In the wrong hands such powerful tech could become a devastating weapon, and hands don't get much more wrong than Darhk's - what exactly is he planning for Star City, and just how will he use his new weapon?