Oliver gets closer to the truth about Prometheus. Meanwhile, Helix refuses to continue helping Felicity until she does a favor for them.false2018-10-29 18:03:30CheckmateKen Shane9.12017TV-14tt5607510593403942ActionAdventureCrimehttps://www.thetvdb.com/banners/episodes/257655/5934039.jpgAdrian HolmesGuestStarhttps://image.tmdb.org/t/p/original/8gfuxasIm5nPx0FccAJQ6JaYxcy.jpgCarly PopeGuestStarhttps://image.tmdb.org/t/p/original/i2yFxKvqmeJElTRTaOWw6b4HRRc.jpgDavid MeunierGuestStarhttps://image.tmdb.org/t/p/original/bBCXP8UmTHjwqAJRO3Nk3UBftBt.jpgDavid NyklGuestStarhttps://image.tmdb.org/t/p/original/qDOUxW2jaYKJM4WRNB2IyYMbeVm.jpgJuliana HarkavyGuestStarhttps://image.tmdb.org/t/p/original/kWo6qS4lT0xSKyBz5GAlTcYnvo2.jpgKacey RohlGuestStarhttps://image.tmdb.org/t/p/original/3K9mZHlP02qahJjaIJTrZEMc2aZ.jpgLexa DoigGuestStarhttps://image.tmdb.org/t/p/original/2YMhgkGtfyJW96RzyDsoy5o3apf.jpgMike DopudGuestStarhttps://image.tmdb.org/t/p/original/2AWev6Jib3VJ3p2FPTxm7Erx81o.jpgRick GonzalezGuestStarhttps://image.tmdb.org/t/p/original/kOvmhXFdj8fH7Q1WgMc53peBkv4.jpg1652017-03-15