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The Flash -- "Plastique" -- Image FLA105a_0537b -- Pictured (L-R): Carlos Valdes as Cisco Ramon and Grant Gustin as Barry Allen -- Photo: Jack Rowand/The CW -- © 2014 The CW Network, LLC. All rights reserved.

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The Flash -- "Plastique" -- Image FLA105a_0840b -- Pictured: Danielle Panabaker as Caitlin Snow -- Photo: Jack Rowand/The CW -- © 2014 The CW Network, LLC. All rights reserved.

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The Flash -- "Plastique" -- Image FLA105b_0269b -- Pictured (L-R): Grant Gustin as Barry Allen and Carlos Valdes as Cisco Ramon -- Photo: Jack Rowand/The CW -- © 2014 The CW Network, LLC. All rights reserved.

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The Flash -- "Plastique" -- Image FLA105b_0336b -- Pictured: Candice Patton as Iris West -- Photo: Jack Rowand/The CW -- © 2014 The CW Network, LLC. All rights reserved.

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The Flash -- "Plastique" -- Image FLA105b_0373b -- Pictured (L-R): Grant Gustin as Barry Allen, Carlos Valdes as Cisco Ramon, and Candice Patton as Iris West -- Photo: Jack Rowand/The CW -- © 2014 The CW Network, LLC. All rights reserved.

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The Flash -- "Plastique" -- Image FLA105b_0696b -- Pictured (L-R): Rick Cosnett as Detective Eddie Thawne and Candice Patton as Iris West -- Photo: Jack Rowand/The CW -- © 2014 The CW Network, LLC. All rights reserved.

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The Flash -- "Plastique" -- Image FLA105c_0658b -- Pictured: Candice Patton as Iris West -- Photo: Jack Rowand/The CW -- © 2014 The CW Network, LLC. All rights reserved.

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The Flash -- "Plastique" -- Image FLA105d_0006b -- Pictured: Grant Gustin as The Flash -- Photo: Cate Cameron /The CW -- © 2014 The CW Network, LLC. All rights reserved.

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The Flash -- "Plastique" -- Image FLA105d_0016b -- Pictured: Candice Patton as Iris West -- Photo: Cate Cameron /The CW -- © 2014 The CW Network, LLC. All rights reserved.

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The Flash -- "Plastique" -- Image FLA105d_0023b -- Pictured: Candice Patton as Iris West -- Photo: Cate Cameron /The CW -- © 2014 The CW Network, LLC. All rights reserved.

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The Flash -- "Plastique" -- Image FLA105d_0038b -- Pictured: Grant Gustin as The Flash -- Photo: Cate Cameron /The CW -- © 2014 The CW Network, LLC. All rights reserved.

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The Flash -- "Plastique" -- Image FLA105d_0199b -- Pictured: Grant Gustin as The Flash -- Photo: Cate Cameron /The CW -- © 2014 The CW Network, LLC. All rights reserved.

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The Flash -- "Plastique" -- Image FLA105a_0448b -- Pictured (L-R): Kelly Frye as Bette and Grant Gustin as Barry Allen -- Photo: Jack Rowand/The CW -- © 2014 The CW Network, LLC. All rights reserved.

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The Flash -- "Plastique" -- Image FLA105a_0596b -- Pictured (L-R): Kelly Frye as Bette and Grant Gustin as Barry Allen -- Photo: Jack Rowand/The CW -- © 2014 The CW Network, LLC. All rights reserved.

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The Flash -- "Plastique" -- Image FLA105a_1019b -- Pictured (L-R): Grant Gustin as The Flash and Kelly Frye as Bette -- Photo: Jack Rowand/The CW -- © 2014 The CW Network, LLC. All rights reserved.