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The Flash -- "Paradox" -- Image: FLA302a_0015b.jpg -- Pictured (L-R): Tom Felton as Julian Albert, Jesse L. Martin as Detective Joe West and Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved

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The Flash -- "Paradox" -- Image: FLA302a_0023b.jpg -- Pictured (L-R): Tom Felton as Julian Albert and Jesse L. Martin as Detective Joe West -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Paradox" -- Image: FLA302a_0115b.jpg -- Pictured (L-R): Jesse L. Martin as Detective Joe West and Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Paradox" -- Image: FLA302a_0140b.jpg -- Pictured (L-R): Jesse L. Martin as Detective Joe West and Candice Patton as Iris West -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Paradox" -- Image: FLA302a_0144b.jpg -- Pictured: Candice Patton as Iris West -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Paradox" -- Image: FLA302a_0333b2.jpg -- Pictured: Grant Gustin as The Flash -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Paradox" -- Image: FLA302a_0358b2.jpg -- Pictured: Grant Gustin as The Flash -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Paradox" -- Image: FLA302a_0425b.jpg -- Pictured: Grant Gustin as The Flash -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Paradox" -- Image: FLA302b_0046b.jpg -- Pictured: Tom Felton as Julian Albert -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Paradox" -- Image: FLA302b_0051b.jpg -- Pictured (L-R): Jesse L. Martin as Detective Joe West and Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Paradox" -- Image: FLA302b_0155b.jpg -- Pictured: Tom Felton as Julian Albert and Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Paradox" -- Image: FLA302b_0201b.jpg -- Pictured: Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Paradox" -- Image: FLA302b_0244b.jpg -- Pictured: Tom Felton as Julian Albert -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Paradox" -- Image: FLA302b_0274b.jpg -- Pictured: Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Paradox" -- Image: FLA302b_0278b.jpg -- Pictured: Carlos Valdes as Cisco Ramon -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.