On this week's new installment of Arrow, Oliver and Lance will do their best to convince Sara to stay in Starling City in order to help Laurel... who will continue her downward spiral.

Arrow Season 2 Episode 13 features Arrow and Lance battling against Nyssa al Ghul to keep Canary away from the League of Assassins.

Look for Alex Kingston to return and for Katrina Law to come on board in a special role. As for what else will go down?

Check out these preview photos from "Heir to the Demon," which airs tomorrow night on The CW - and don't forget you can watch Arrow online right here at TV Fanatic. Sit back and scroll away!