Roy and Thea chat, and from what we know, he warns her of Malcolm.
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Roy is suited up as he breaks into the sibling's discussion.
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Well, Black Canary seems to be a gone girl. What happened?
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Oliver gives talking Black Canary off the ledge another shot.
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Arrow and Arsenal appear to feel they have no choice but to watch Black Canary self destruct.
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Arrow is pulling a signature Arsenal jump. No stealing!
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Arrow and Arsenal are running about Starling City!
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Here comes the bad guy. Arrow and Arsenal are in hot pursuit.
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Arrow Quotes

Ra's al Ghul: You tasted death and you wanted more, but the truth is everyone and everything must come to an end. Even for one such as me.
Oliver: Kill me, but spare John Diggle's life. Let him go. I will beg for it.
Ra's al Ghul: You have shown tremendous strength, fortitude, power. No, Mr. Queen. I don't want to kill you. I want you to take my place. I want you to become the next Ra's al Ghul.

You know Oliver, somebody once told me that secrets have weight. The more you keep, the harder it is to keep moving.

Diggle