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The Flash -- "Into the Speed Force" -- FLA316a_0223b.jpg -- Pictured: Robbie Amell as Ronnie -- Photo: Diyah Pera/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Into the Speed Force" -- FLA316b_0021b.jpg -- Pictured: Wentworth Miller as Leonard Snart/Captain Cold -- Photo: Jack Rowand/The CW -- © 2017 The CW Network, LLC. All rights reserved

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The Flash -- "Into the Speed Force" -- FLA316b_0022b.jpg -- Pictured: Barry Allen as The Flash -- Photo: Diyah Pera/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Into the Speed Force" -- FLA316b_0065b.jpg -- Pictured: Grant Gustin as Barry Allen -- Photo: Diyah Pera/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Into the Speed Force" -- FLA316b_0102b.jpg -- Pictured (L-R): Grant Gustin as Barry Allen and Wentworth Miller as Leonard Snart/Captain Cold -- Photo: Diyah Pera/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Into the Speed Force" -- FLA316b_0113b.jpg -- Pictured: Grant Gustin as Barry Allen and John Wesley Ship as Jay Garrick -- Photo: Jack Rowand/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Into the Speed Force" -- FLA316b_0124b.jpg -- Pictured: Grant Gustin as Barry Allen and John Wesley Ship as Jay Garrick -- Photo: Jack Rowand/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Into the Speed Force" -- FLA316b_0173b.jpg -- Pictured (L-R): John Wesley Ship as Jay Garrick and Grant Gustin as Barry Allen -- Photo: Jack Rowand/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Into the Speed Force" -- FLA316b_0289b.jpg -- Pictured (L-R): John Wesley Ship as Jay Garrick and Grant Gustin as Barry Allen -- Photo: Jack Rowand/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Into the Speed Force" -- FLA316c_0019b.jpg -- Pictured (L-R): Grant Gustin as Barry Allen, Candice Patton as Iris West and Jesse L. Martin as Detective Joe West -- Photo: Robert Falconer/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Into the Speed Force" -- FLA316c_0025b.jpg -- Pictured: Grant Gustin as Barry Allen -- Photo: Robert Falconer/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Into the Speed Force" -- FLA316c_0050b.jpg -- Pictured (L-R): Candice Patton as Iris West and Jesse L. Martin as Detective Joe West -- Photo: Robert Falconer/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Into the Speed Force" -- FLA316c_0084b.jpg -- Pictured (L-R): Grant Gustin as Barry Allen and Rick Cosnett as Detective Eddie Thawne -- Photo: Robert Falconer/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Into the Speed Force" -- FLA316c_0097b.jpg -- Pictured: Rick Cosnett as Detective Eddie Thawne -- Photo: Robert Falconer/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Into the Speed Force" -- FLA316c_0218b.jpg -- Pictured (L-R): Grant Gustin as Barry Allen and Rick Cosnett as Detective Eddie Thawne -- Photo: Robert Falconer/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Into the Speed Force" -- FLA316c_0278b.jpg -- Pictured (L-R): Grant Gustin as Barry Allen and Rick Cosnett as Detective Eddie Thawne -- Photo: Robert Falconer/The CW -- © 2017 The CW Network, LLC. All rights reserved.