Felicity's past as a crusading hacker is revealed when someone uses a super virus that she designed to bring Starling City to a standstill. Meanwhile, Oliver and Thea work on their new relationship, and Felicity's mother pays a visit.
Lost — Kris Allen
Someone knocks at Thea's flat's door it's Oliver with a bag of popcorn, after Thea let's him she suggests he move in with her.