For the character, see Cisco Ramon (Earth-19).

"Echo" is the seventeenth chapter of the comic book series Arrow: Season 2.5, and the first chapter in the Green arc. It was released digitally on April 13, 2015.


Caleb Green has two things: Mirakuru serum coursing through his veins—and a beef with Oliver Queen! Don't miss the start of Season 2.5's new story arc: "Green"![1]



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