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The Flash -- "Invincible" -- Image: FLA222a_0039b.jpg -- Pictured (L-R): Katie Cassidy as Black Siren, Carlos Valdes as Reverb and Danielle Panabaker as Killer Frost -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invincible" -- Image: FLA222a_0071b.jpg -- Pictured: Danielle Panabaker as Killer Frost -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invincible" -- Image: FLA222a_0072b.jpg -- Pictured: Katie Cassidy as Black Siren -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invincible" -- Image: FLA222a_0399b.jpg -- Pictured (L-R): Grant Gustin as The Flash and Keiynan Lonsdale as Wally West -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invincible" -- Image: FLA222a_0433b.jpg -- Pictured (L-R): Grant Gustin as The Flash and Katie Cassidy as Black Siren -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invincible" -- Image: FLA222a_0538b2.jpg -- Pictured: Katie Cassidy as Black Siren -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invincible" -- Image: FLA222a_0541b.jpg -- Pictured: Katie Cassidy as Black Siren -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invincible" -- Image: FLA222a_0542b.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 -- "Invincible" -- Image: FLA222b_0018b.jpg -- Pictured (L-R): Teddy Sears as Jay Garrick and Katie Cassidy as Black Siren -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invincible" -- Image: FLA222b_0026b.jpg -- Pictured (L-R): Teddy Sears as Jay Garrick and Katie Cassidy as Black Siren -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invincible" -- Image: FLA222b_0057b.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 -- "Invincible" -- Image: FLA222b_0060b.jpg -- Pictured: Teddy Sears as Jay Garrick -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invincible" -- Image: FLA222b_0261b.jpg -- Pictured (L-R): Patrick Sabongui as Captain Singh 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 -- "Invincible" -- Image: FLA222b_0301b.jpg -- Pictured (L-R): Patrick Sabongui as Captain Singh, 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.