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The Flash -- "Rogue Time" -- Image FLA116A_0236b -- Pictured: Dominic Percell as Mick Rory/Heat Wave -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time" -- Image FLA116A_0441b -- Pictured (L-R): Peyton List as Lisa Snart and Carlos Valdes as Cisco Ramon -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time"-- Image FLA116A_0480b -- Pictured (L-R): Peyton List as Lisa Snart, Carlos Valdes as Cisco Ramon, and Wentworth Miller as Leonard Snart/Captain Cold -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time" -- Image FLA116A_0481b -- Pictured (L-R): Carlos Valdes as Cisco Ramon and Wentworth Miller as Leonard Snart/Captain Cold -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time" -- Image FLA116A_0530b -- Pictured (L-R): Dominic Percell as Mick Rory/Heat Wave and Peyton List as Lisa Snart -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time" -- Image FLA116A_0535b -- Pictured (L-R): Wentworth Miller as Leonard Snart/Captain Cold, Nicholas Gonzalez as Dante Ramon, and Carlos Valdes as Cisco Ramon -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time" -- Image FLA116A_0554b -- Pictured (L-R): Dominic Percell as Mick Rory/Heat Wave and Peyton List as Lisa Snart -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved

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The Flash -- "Rogue Time" -- Image FLA116A_0557b -- Pictured: Wentworth Miller as Leonard Snart/Captain Cold -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time" -- Image FLA116A_0629b -- Pictured (L-R): Nicholas Carlos Valdes as Cisco Ramon and Gonzalez as Dante Ramon -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time" -- Image FLA116B_0011bc -- Pictured: Wentworth Miller as Leonard Snart/Captain Cold -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time" -- Image FLA116B_0031b -- Pictured: Wentworth Miller as Leonard Snart/Captain Cold -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time" -- Image FLA116B_0049b -- Pictured: Peyton List as Lisa Snart -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time" -- Image FLA116B_0080b -- Pictured: Peyton List as Lisa Snart -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time" -- Image FLA116B_0129b -- Pictured (L-R): Grant Gustin as Barry Allen / The Flash and Peyton List as Lisa Snart -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time" -- Image FLA116B_0142b -- Pictured: Grant Gustin as Barry Allen / The Flash -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time" -- Image FLA116B_0149b -- Pictured (L-R): Grant Gustin as Barry Allen / The Flash and Peyton List as Lisa Snart -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time"-- Image FLA116B_0232b -- Pictured: Wentworth Miller as Leonard Snart/Captain Cold -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time" -- Image FLA116B_0301b -- Pictured (L-R): Grant Gustin as Barry Allen / The Flash, Peyton List as Lisa Snart, and Wentworth Miller as Leonard Snart/Captain Cold -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time"-- Image FLA116B_0321b -- Pictured (L-R): Jesse L. Martin as Detective Joe West and Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time"-- Image FLA116B_0331b -- Pictured (L-R): Jesse L. Martin as Detective Joe West and Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time"-- Image FLA116B_0388b -- Pictured (L-R): Carlos Valdes as Cisco Ramon, Grant Gustin as Barry Allen, and Peyton List as Lisa Snart -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time" -- Image FLA116B_0414b -- Pictured (L-R): Carlos Valdes as Cisco Ramon and Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time" -- Image FLA116B_0423b -- Pictured (L-R): Carlos Valdes as Cisco Ramon and Peyton List as Lisa Snart -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.

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The Flash -- "Rogue Time"-- Image FLA116B_0458b -- Pictured (L-R): Carlos Valdes as Cisco Ramon and Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2015 The CW Network, LLC. All rights reserved.