This marks the biggest episode in the history of Arrow. Find out why in this special producer's preview.
Look who has come to Starling City. Watch this promo for Arrow and start to be very afraid for what's to come.

Arrow Season 2 Episode 15 Quotes

Moira: What should we drink to?
Slade: To friendship.

Slade: You and I have something in common.
Moira: What's that?
Slade: I know how difficult it is to pick yourself up when other people have written you off.