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The Flash -- "The New Rouges" -- Image FLA304a_0027b.jpg -- Pictured (L-R): Grey Damon as Sam Scudder and Ashley Rickards as Rosalind Rosa Dillion -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "The New Rouges" -- Image FLA304a_0030b.jpg -- Pictured (L-R): Grey Damon as Sam Scudder and Ashley Rickards as Rosalind Rosa Dillion -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "The New Rouges" -- Image FLA304a_0037b.jpg -- Pictured: Grey Damon as Sam Scudder -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "The New Rouges" -- Image FLA304a_0078b.jpg -- Pictured (L-R): Grey Damon as Sam Scudder and Ashley Rickards as Rosalind Rosa Dillion -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "The New Rouges" -- Image FLA304a_0085b.jpg -- Pictured (L-R): Grant Gustin as The Flash and Violett Beane as Jesse Quick -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "The New Rouges" -- Image FLA304a_0099b.jpg -- Pictured: Violett Beane as Jesse Quick -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "The New Rouges" -- Image FLA304a_0175b.jpg -- Pictured (L-R): Violett Beane as Jesse Quick and Grant Gustin as The Flash -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "The New Rouges" -- Image FLA304a_0208b.jpg -- Pictured (L-R): Grant Gustin as The Flash and Violett Beane as Jesse Quick -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "The New Rouges" -- Image FLA304b_0022b.jpg -- Pictured (L-R): Grey Damon as Sam Scudder and Wentworth Miller as Leonard Snart/Captain Cold -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved

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The Flash -- "The New Rouges" -- Image FLA304b_0027b.jpg -- Pictured: Grant Gustin as The Flash -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "The New Rouges" -- Image FLA304b_0115b.jpg -- Pictured: Grey Damon as Sam Scudder -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "The New Rouges" -- Image FLA304b_0141b.jpg -- Pictured (L-R): Grey Damon as Sam Scudder and Wentworth Miller as Leonard Snart/Captain Cold -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "The New Rouges" -- Image FLA304b_0147b.jpg -- Pictured: Wentworth Miller as Leonard Snart/Captain Cold -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "The New Rouges" -- Image FLA304b_0235b.jpg -- Pictured: Violett Beane as Jesse Quick -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "The New Rouges" -- Image FLA304b_0242b.jpg -- Pictured: Violett Beane as Jesse Quick -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.