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The Flash -- "Invasion!" -- Image FLA308a_0185b.jpg -- Pictured: Melissa Benoist as Kara/Supergirl -- Photo: Michael Courtney/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308a_0215b.jpg -- Pictured: Grant Gustin as The Flash -- Photo: Michael Courtney/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308a_0244b.jpg -- Pictured: Melissa Benoist as Kara/Supergirl -- Photo: Michael Courtney/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308a_0321b.jpg -- Pictured (L-R): David Ramsey as John Diggle, Willa Holland as Speedy, Melissa Benoist as Kara/Supergirl, Brandon Routh as Ray Palmer/Atom, Caity Lotz as Sara Lance/White Canary, Franz Drameh as Jefferson "Jax" Jackson and Dominic Purcell as Mick Rory/Heat Wave -- Photo: Michael Courtney/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308a_0339b.jpg -- Pictured (L-R): Willa Holland as Speedy, David Ramsey as John Diggle, Melissa Benoist as Kara/Supergirl, Caity Lotz as Sara Lance/White Canary and Franz Drameh as Jefferson "Jax" Jackson -- Photo: Michael Courtney/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308b_0012b.jpg -- Pictured (L-R): Victor Garber as Professor Martin Stein, Caity Lotz as Sara Lance/White Canary, Dominic Purcell as Mick Rory/Heat Wave, Franz Drameh as Jefferson "Jax" Jackson and Brandon Routh as Ray Palmer/Atom -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308b_0046b.jpg -- Pictured (L-R): Stephen Amell as Oliver Queen, David Ramsey as John Diggle, Willa Holland as Thea Queen, Emily Bett Rickards as Felicity Smoak, Victor Garber as Professor Martin Stein, Caity Lotz as Sara Lance/White Canary, Dominic Purcell as Mick Rory/Heat Wave, Franz Drameh as Jefferson "Jax" Jackson and Brandon Routh as Ray Palmer/Atom -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308b_0073b.jpg -- Pictured (L-R): Emily Bett Rickards as Felicity Smoak, Victor Garber as Professor Martin Stein, Caity Lotz as Sara Lance/White Canary, Dominic Purcell as Mick Rory/Heat Wave, Franz Drameh as Jefferson "Jax" Jackson and Brandon Routh as Ray Palmer/Atom -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308b_0080b.jpg -- Pictured: Stephen Amell as Oliver Queen, David Ramsey as John Diggle and Willa Holland as Thea Queen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308b_0132b.jpg -- Pictured (L-R): Victor Garber as Professor Martin Stein, Caity Lotz as Sara Lance/White Canary and Dominic Purcell as Mick Rory/Heat Wave -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308b_0134b.jpg -- Pictured (L-R): Victor Garber as Professor Martin Stein, Caity Lotz as Sara Lance/White Canary, Dominic Purcell as Mick Rory/Heat Wave, Franz Drameh as Jefferson "Jax" Jackson and Brandon Routh as Ray Palmer/Atom -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308b_0162.jpg -- Pictured (L-R) Carlos Valdes as Cisco Ramon, Melissa Benoist as Kara/Supergirl and Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved

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The Flash -- "Invasion!" -- Image FLA308b_0171b.jpg -- Pictured (L-R): Candice Patton as Iris West, Tom Cavanagh as Harrison Wells, Emily Bett Rickards as Felicity Smoak and Danielle Panabaker as Caitlin Snow -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308b_0234b.jpg -- Pictured (L-R): Melissa Benoist as Kara/Supergirl and Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308b_0258b.jpg -- Pictured (L-R): Tom Cavanagh as Harrison Wells and Emily Bett Rickards as Felicity Smoak -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308b_0397.jpg -- Pictured (L-R) Stephen Amell as Oliver Queen, Melissa Benoist as Kara/Supergirl and Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved

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The Flash -- "Invasion!" -- Image FLA308b_0401b.jpg -- Pictured (L-R): Melissa Benoist as Kara/Supergirl and Tom Cavanagh as Harrison Wells -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308b_0440b.jpg -- Pictured (L-R): Dominic Purcell as Mick Rory/Heat Wave, Melissa Benoist as Kara/Supergirl and Franz Drameh as Jefferson "Jax" Jackson -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308b_0445b.jpg -- Pictured (L-R): Melissa Benoist as Kara/Supergirl and Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308b_0451b.jpg -- Pictured (L-R): Stephen Amell as Oliver Queen, David Ramsey as John Diggle and Willa Holland as Thea Queen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308b_0493b.jpg -- Pictured (L-R): Stephen Amell as Oliver Queen, Melissa Benoist as Kara/Supergirl and Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308c_0143b.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 -- "Invasion!" -- Image FLA308c_0247b.jpg -- Pictured (L-R): Grant Gustin as The Flash and Stephen Amell as Green Arrow -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308c_0293b.jpg -- Pictured (L-R): Stephen Amell as Green Arrow and Grant Gustin as The Flash -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308c_0343b.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 -- "Invasion!" -- Image FLA308c_0412b.jpg -- Pictured: Stephen Amell as Green Arrow -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

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The Flash -- "Invasion!" -- Image FLA308c_0466.jpg -- Pictured (L-R) Grant Gustin as The Flash, Stephen Amell as Green Arrow and David Ramsey as John Diggle -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved