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Watch Arrow Season 2 Episode 23 : Unthinkable Full Episode Online

As Oliver's face off with Slade escalates, his resolve to the no-kill rule is tested. Especially as Slade targets the woman Oliver loves.

Genre: Crime, Drama, Mystery, Action & Adventure

Air Date: 2014-05-14

Season Number: 2
Episodes Number: 23

First Air Date: 2012-10-10

Last Air Date: 2018-05-17

Runtime: 42 min