Diggle and Roy appear to be in deep thought in this photo.
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Cupid must be very worried...her new boy toy is already injured. At least he's shirtless. Just sayin'.
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Diggle, Deadshot, Cupid and Laya pound the tracks.
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Diggle leads Layla and Cupid as they search the woods.
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Dig and Lyla dance on their wedding day as man and wife.
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Diggle and Lyla look too dour for their wedding day.
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With this ring, Oliver gives his full support to his brother, Diggle.
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John, Lyla and baby Sara are now, officially, a family in the eyes of the law.
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Arrow Quotes

Diggle: I see you brought your plus one.
Ray: Nice to meet you. Ray Palmer.
Diggle: John Diggle. [whispering into Ray's ear] You hurt her, they'll never find your body. [louder] Nice to meet you!

Felicity: What's going on? Ray?
Ray: Oliver Queen is the Arrow.
Felicity: What?
Ray: I have a 140 IQ and three PhDs, but it's pretty hard to insult my intelligence, but I'm pretty sure you just did. It all makes sense now. Your, ah, sudden disappearances, your apprehension of helping me with my mission. You've been working with the Arrow this whole time.