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The Flash -- "Duet" -- FLA317a_0178b.jpg -- Pictured (L-R): Carlos Valdes as Cisco Ramon, Grant Gustin as Barry Allen, Candice Patton as Iris West, Tom Cavanagh as Harrison Wells, Chris Wood as Mike, Melissa Benoist as Kara/Supergirl, Danielle Panabaker as Caitlin Snow, and David Harewood as Hank Henshaw -- Photo: Katie Yu/The CW -- © 2017 The CW Network, LLC. All rights reserved.