Arrow › Season 5 › Episode 16
Arrow Season 5 Episode 16“Checkmate”
The CW · S5E16 · Aired March 15, 2017 · 60 min · ★ 7.2/10
Oliver learns who he's up against, and that Prometheus isn't his only enemy. Meanwhile, Felicity is forced to turn to Helix to get the information she needs to find Susan.
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