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The Flash -- "Attack on Gorilla City" -- FLA313a_0067b.jpg -- Pictured (L-R): Danielle Panabaker as Caitlin Snow and Tom Felton as Julian Albert -- Photo: Katie Yu/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Attack on Gorilla City" -- FLA313a_0102b.jpg -- Pictured: Danielle Panabaker as Caitlin Snow -- Photo: Katie Yu/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Attack on Gorilla City" -- FLA313d_0095b.jpg -- Pictured: Danielle Panabaker as Caitlin Snow -- Photo: Jack Rowand/The CW -- © 2017 The CW Network, LLC. All rights reserved

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The Flash -- "Attack on Gorilla City" -- FLA313d_0107b.jpg -- Pictured: Carlos Valdes as Cisco Ramon -- Photo: Jack Rowand/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Attack on Gorilla City" -- FLA313d_0115b.jpg -- Pictured: Tom Felton as Julian Albert -- Photo: Jack Rowand/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Attack on Gorilla City" -- FLA313d_0425b.jpg -- Pictured: Tom Cavanagh as Harrison Wells -- Photo: Jack Rowand/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Attack on Gorilla City" -- FLA313d_0437b.jpg -- Pictured (L-R): Danielle Panabaker as Caitlin Snow, Grant Gustin as Barry Allen, Carlos Valdes as Cisco Ramon and Tom Felton as Julian Albert -- Photo: Jack Rowand/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Attack on Gorilla City" -- FLA313d_0444b.jpg -- Pictured: Grant Gustin as Barry Allen -- Photo: Jack Rowand/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Attack on Gorilla City" -- FLA313e_0029b.jpg -- Pictured (L-R): Tom Felton as Julian Albert and Carlos Valdes as Cisco Ramon -- Photo: Jack Rowand/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Attack on Gorilla City" -- FLA313e_0210b.jpg -- Pictured: Tom Cavanagh as Harrison Wells -- Photo: Jack Rowand/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Attack on Gorilla City" -- FLA313e_0230b.jpg -- Pictured (L-R): Tom Cavanagh as Harrison Wells and Danielle Panabaker as Caitlin Snow -- Photo: Jack Rowand/The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Attack on Gorilla City" -- FLA313e_0401b.jpg -- Pictured (L-R): Danielle Panabaker as Caitlin Snow 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 -- "Attack on Gorilla City" -- FLA313_00106.jpg -- Pictured: Solovar (voiced by Keith David) -- Photo: The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Attack on Gorilla City" -- FLA313_00108.jpg -- Pictured: Grodd (voiced by David Sobolov) -- Photo: The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Attack on Gorilla City" -- FLA313_0023.jpg -- Pictured (L-R): Grant Gustin as The Flash and Solovar (voiced by Keith David) -- Photo: The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Attack on Gorilla City" -- FLA313_005.jpg -- Pictured (L-R): Danielle Panabaker as Caitlin Snow and Grodd (voiced by David Sobolov) -- Photo: The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Attack on Gorilla City" -- FLA313_0183.jpg -- Pictured: Grodd (voiced by David Sobolov) -- Photo: The CW -- © 2017 The CW Network, LLC. All rights reserved.

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The Flash -- "Attack on Gorilla City" -- FLA313_044.jpg -- Pictured: Grodd (voiced by David Sobolov) -- Photo: The CW -- © 2017 The CW Network, LLC. All rights reserved.