Arrow 5x16 "Checkmate" Season 5 Episode 16 Promo - OLIVER SEEKS THE TRUTH — Oliver (Stephen Amell) gets closer to the truth about Prometheus. Meanwhile, Helix refuses to continue helping Felicity (Emily Bett Rickards) until she does a favor for them.
Ken Shane directed the episode written by Beth Schwartz & Sarah Tarkoff (#516).
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