The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609b_0412b.jpg -- Pictured (L-R): John Wesley Shipp as Flash 90 and Cress Williams as Black Lightning -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609a_0327b2.jpg -- Pictured (L-R): Tom Cavanagh as Pariah and Cress Williams as Black Lightning -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609a_00143b3.jpg -- Pictured (L-R): Grant Gustin as Barry Allen/The Flash, Candice Patton as Iris West - Allen, Tyler Hoechlin as Superman and Brandon Routh as Superman -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609c_0008b2.jpg -- Pictured (L-R): LaMonica Garrett as The Monitor and Carlos Valdes as Vibe -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609d_0250b.jpg -- Pictured: Jon Cryer as Lex Luthor -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609d_0205b.jpg -- Pictured (L-R): Jon Cryer as Lex Luthor and Ruby Rose as Kate Kane/Batwoman -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609d_0382b.jpg -- Pictured (L-R): Melissa Benoist as Kara/Supergirl and Ruby Rose as Kate Kane/Batwoman -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609a_0047b.jpg -- Pictured: Candice Patton as Iris West - Allen -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609a_0120b.jpg -- Pictured: David Ramsey as John Diggle/Spartan-- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609a_0240b.jpg -- Pictured: LaMonica Garret as The Monitor -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609d_0467b.jpg -- Pictured: Melissa Benoist as Kara/Supergirl -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609c_0061b2.jpg -- Pictured: Carlos Valdes as Vibe -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609a_0262b3.jpg -- Pictured (L-R): Cress Williams as Black Lightning, Osric Chau as Ryan Choi, Grant Gustin as Barry Allen/The Flash, Brandon Routh as Superman and Hartley Sawyer as Dibney/Elongated Man -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609a_0285b2.jpg -- Pictured (L-R): Hartley Sawyer as Dibney/Elongated Man, Grant Gustin as Barry Allen/The Flash and Brandon Routh as Superman -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609a_0314b.jpg -- Pictured (L-R): Candice Patton as Iris West - Allen, Tyler Hoechlin as Superman and LaMonica Garret as The Monitor -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609a_0361b.jpg -- Pictured: Cress Williams as Black Lightning -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609d_0234b.jpg -- Pictured (L-R): Ruby Rose as Kate Kane/Batwoman and Melissa Benoist as Kara/Supergirl -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis On Infinite Earths: Hour Three" -- Image Number: FLA609b_0048b.jpg -- Pictured (L-R): Tom Cavanagh as Pariah and Cress Williams as Black Lightning -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All rights reserved

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609b_0210b2.jpg -- Pictured (L-R): John Wesley Shipp as Flash 90, Danielle Panabaker as Killer Frost and Carlos Valdes as Cisco Ramon/Vibe -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

The Flash -- "Crisis on Infinite Earths: Part Three" -- Image Number: FLA609b_0422b.jpg -- Pictured: John Wesley Shipp as Flash 90 -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Crisis on Infinite Earths: Part One" -- Image Number: SPG509c_0093r.jpg -- Pictured (L-R): Ruby Rose as Kate Kane/Batwoman, Tyler Hoechlin as Clark Kent/Superman, Brandon Routh as Ray Palmer/Atom, Grant Gustin as The Flash and Melissa Benoist as Kara/Supergirl -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Crisis on Infinite Earths: Part One" -- Image Number: SPG509c_0046r.jpg -- Pictured: Stephen Amell as Oliver Queen/Green Arrow -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Crisis on Infinite Earths: Part One" -- Image Number: SPG509b_0410r.jpg -- Pictured (L-R): Grant Gustin as The Flash, Audrey Marie Anderson as Harbinger, Caity Lotz as Sara Lance/White Canary and Brandon Routh as Ray Palmer/Atom -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Crisis on Infinite Earths: Part One" -- Image Number: SPG509c_0258r.jpg -- Pictured: Ruby Rose as Kate Kane/Batwoman -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Crisis on Infinite Earths: Part One" -- Image Number: SPG509c_0168r.jpg -- Pictured (L-R): Tyler Hoechlin as Clark Kent/Superman and Grant Gustin as The Flash -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Crisis on Infinite Earths: Part One" -- Image Number: SPG509b_0123r.jpg -- Pictured (L-R): Chyler Leigh as Alex Danvers, Melissa Benoist as Kara/Supergirl, Elizabeth Tulloch as Lois Lane, Tyler Hoechlin as Clark Kent/Superman, Ruby Rose as Kate Kane/Batwoman, Audrey Marie Anderson as Harbinger, Stephen Amell as Oliver Queen/Green Arrow and Katherine McNamara as Mia -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Crisis on Infinite Earths: Part One" -- Image Number: SPG509a_0098r.jpg -- Pictured (L-R): Tyler Hoechlin as Clark Kent/Superman and Elizabeth Tulloch as Lois Lane -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Crisis on Infinite Earths: Part One" -- Image Number: SPG509b_0158r.jpg -- Pictured (L-R): Elizabeth Tulloch as Lois Lane, Tyler Hoechlin as Clark Kent/Superman and Ruby Rose as Kate Kane/Batwoman -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Crisis on Infinite Earths: Part One" -- Image Number: SPG509b_0013r.jpg -- Pictured (L-R): Chyler Leigh as Alex Danvers, Jesse Rath as Brainiac-5 and Melissa Benoist as Kara/Supergirl -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Crisis on Infinite Earths: Part One" -- Image Number: SPG509a_0007r.jpg -- Pictured (L-R): Chyler Leigh as Alex Danvers and Katie McGrath as Lena Luthor -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Crisis on Infinite Earths: Part One" -- Image Number: SPG509b_0093r.jpg -- Pictured (L-R): Chyler Leigh as Alex Danvers, Melissa Benoist as Kara/Supergirl, Elizabeth Tulloch as Lois Lane, Tyler Hoechlin as Clark Kent/Superman and Ruby Rose as Kate Kane/Batwoman -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Crisis on Infinite Earths: Part One" -- Image Number: SPG509b_0043r.jpg -- Pictured (L-R): Chyler Leigh as Alex Danvers and Melissa Benoist as Kara/Supergirl -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- ÒCrisis On Infinite Earths: Part OneÒ -- Image Number: SPG509b_BTS_0440r.jpg -- Pictured (L-R): Melissa Benoist as Kara/Supergirl, Brandon Routh as Ray Palmer/Atom, Stephen Amell as Oliver Queen/Green Arrow, Ruby Rose as Kate Kane/Batwoman, Chyler Leigh as Alex Danvers, Grant Gustin as The Flash, David Harewood as Hank Henshaw/JÕonn JÕonzz, Jesse Rath as Brainiac-5, (Bottom Row: Audrey Marie Anderson as Harbinger, Katherine McNamara as Mia, Caity Lotz as Sara Lance/White Canary, Tyler Hoechlin as Clark Kent/Superman and Bitsie Tulloch as Lois Lane -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Crisis on Infinite Earths: Part One" -- Image Number: SPG509b_0347r.jpg -- Pictured (L-R): Ruby Rose as Kate Kane/Batwoman and Brandon Routh as Ray Palmer/Atom -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Crisis on Infinite Earths: Part One" -- Image Number: SPG509b_0276r.jpg -- Pictured (L-R): Tyler Hoechlin as Clark Kent/Superman and Stephen Amell as Oliver Queen/Green Arrow -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Crisis on Infinite Earths: Part One" -- Image Number: SPG509b_0207r.jpg -- Pictured (L-R): Stephen Amell as Oliver Queen/Green Arrow and Katherine McNamara as Mia -- Photo: Katie Yu/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Crisis on Infinite Earths: Part One" -- Image Number: SPG509c_0128r.jpg -- Pictured (L-R): Ruby Rose as Kate Kane/Batwoman, Tyler Hoechlin as Clark Kent/Superman and Brandon Routh as Ray Palmer/Atom -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Crisis on Infinite Earths: Hour One" -- (L-R): Grant Gustin as The Flash, Melissa Benoist as Kara/Supergirl, Tyler Hoechlin as Clark Kent/Superman, Ruby Rose as Kate Kane/Batwoman and Brandon Routh as Ray Palmer/Atom --