The CW's superheroes assemble in new images from the Nov. 29 episode of "The Flash," titled "Invasion," part of the epic crossover that pits the Arrowverse against alien invaders.

RELATED: The Arrowverse's Heroes Welcome Supergirl in New Crossover Clip

Many of the stills will be familiar from the promos for the event, which depict Grant Gustin's Barry Allen introducing Melissa Benoist's Supergirl to Team Arrow, Team Flash and the Legends of Tomorrow. Others, however, are a less cheery, as the heroes suit up to defend a world under attack by the Dominators.

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.
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.

IT’S HEROES VS. ALIENS IN THIS EPIC CROSSOVER EVENT — When aliens called the Dominators attack Central City, Barry (Grant Gustin) speeds over to Star City to ask the Green Arrow (guest star Stephen Amell) for help in stopping them. Realizing the battle against the Dominators is bigger than they thought, they track down the Legends of Tomorrow, and Barry and Cisco (Carlos Valdes) create a breach to bring back a secret weapon – Supergirl (guest star Melissa Benoist). Once all of the super friends are assembled, they come up with a plan to attack but a shocking secret related to Flashpoint is revealed and suddenly no one is sure who they can trust. Meanwhile, Wally (Keiynan Lonsdale) wants to join the battle against the aliens but Iris (Candice Patton) tells him he’s not ready. Dermott Downs directed the episode with story by Greg Berlanti & Andrew Kreisberg and teleplay by Aaron Helbing & Todd Helbing (#308). Original airdate 11/29/2016.

The crossover begins Monday, Nov. 28, on the midseason finale of "Supergirl," and continues Tuesday, Nov. 29, on "The Flash" and Wednesday, Nov. 30, on "Arrow" before concluding Thursday, Dec. 1, on "DC's Legends of Tomorrow."

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.
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.
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
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
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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
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
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
The Flash -- Invasion! -- Image FLA308a_0399b.jpg -- Pictured (L-R): 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.
The Flash -- "Invasion!" -- Image FLA308a_0399b.jpg -- Pictured (L-R): 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.
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.
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.
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.
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.
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.
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.
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.
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.
The Flash -- Invasion! -- Image FLA308a_0159b.jpg -- Pictured: Grant Gustin as The Flash -- Photo: Michael Courtney/The CW -- © 2016 The CW Network, LLC. All rights reserved.
The Flash -- "Invasion!" -- Image FLA308a_0159b.jpg -- Pictured: Grant Gustin as The Flash -- Photo: Michael Courtney/The CW -- © 2016 The CW Network, LLC. All rights reserved.
The Flash -- Invasion! -- Image FLA308a_0048b.jpg -- Pictured: Melissa Benoist as Kara/Supergirl -- Photo: Michael Courtney/The CW -- © 2016 The CW Network, LLC. All rights reserved
The Flash -- "Invasion!" -- Image FLA308a_0048b.jpg -- Pictured: Melissa Benoist as Kara/Supergirl -- Photo: Michael Courtney/The CW -- © 2016 The CW Network, LLC. All rights reserved