Arrow Finale Clip: Save Laurel, Or Stop the Mirakuru Army?

So far, we've seen quite a bit of promotion for Arrow's upcoming Season Two finale that revolves around two groups clashing inside of a tunnel, traffic stalled around them. Well, it looks like now we know how we got to that point. In a new promotional clip released to TV Guide, The CW have given away one thing we already know -- that Laurel has been kidnapped by the Mirakuru Army -- combined it with a second thing we already know -- that Nyssa Raatko, the daughter of Ra's al Ghul, is back -- and pointed that concoction at the Giordano (nice!) Bridge. You can check out the clip below. Arrow's season finale airs tomorrow night at 8 p.m. ET/PT on The CW.