It's an important thing to consider, given the people they've dealt with in their world and the implications that could have for what other versions of Oliver might have experienced. Did this other Oliver have a Digg and a Felicity too? And more importantly, did he have a Slade? A Count Vertigo? A Sebastian Blood? Felicity doesn't like to think about it, but she's sure Oliver has - the possibility that things are just different enough they won't recognize a threat if one does come to Darrow. Someone who has a grudge against the Oliver in their world, who doesn't care that he's not the same, only that his name is Oliver Queen.

"I wish I had a way to figure that out," she says, even as she's trying to come up with a way to figure it out. "I mean, I could start hacking people's e-mails and phone records, but they're not necessarily going to reveal anything. Have you noticed anyone else you've met acting...strange around you?"