We're only three episodes in, and he's only been in two of them, but Echo Kellum is already proving himself to be a fantastic addition to the Arrow cast this year. There's still plenty more to learn about him, but so far he's a fun, smart character, and has quickly developed an excellent (and awkward) rapport with Felicity, er, Miss Smoak. He's also a bit useless in this episode. When Palmer Tech comes under attack from Double Down, it's up to Felicity to lead them to safety (or what's supposed to be safety - bonus question: how did he get down there? Is there really just an open staircase?). Yes, Felicity always has been a badass, and it's great she's getting to prove it here - especially when blindly firing the gun - but Curtis Holt is going to need a bit more to him if he's gonna survive hanging out with her. He's going to become Mr Terrific at some point - he pointedly talks about wanting to help the city, and there's an early sign of some T-Spheres - but when will that be, and how exactly is the transformation going to happen?