Supergirl, The Flash, Arrow & DC's Legends Of Tomorrow Crossover Trailer: Superheroes Battle Aliens

Next week brings an unprecedented television event to The CW. All of the DC Comics television shows on the broadcast network will be crossing over into each other. Supergirl, The Flash, Arrow and DC's Legends of Tomorrow will all share one overarching story that sees aliens called Dominators, spread out over four nights next week. Footage from the highly anticipated event has been teased in recent weeks, but now you can check out a full length trailer for what promises to be a huge week of TV.

Watch the DC TV crossover trailer after the jump.

If for some reason you're not all caught up on these shows, or maybe you're just curious about how this crossover is going to work even though you don't watch any of the individual shows otherwise, here are the synopses for each of the episodes:

A NIGHT OF CONFESSIONS; THE EPIC SUPERHERO CROSSOVER KICKS OFF TONIGHT — Eliza (guest star Helen Slater) comes to town to celebrate Thanksgiving with her daughters. Alex (Chyler Leigh) decides it's time to come out to her mother; Kara (Melisa Benoist) is shocked when Eliza suggests Mon-El (Chris Wood) has feelings for her, and Winn (Jeremy Jordan) and James (Mehcad Brooks) consider telling Kara the truth about the Guardian. Meanwhile, CADMUS unleashes a virus that instantly kills any alien in the vicinity so Kara enlists an unexpected ally – Lena Luthor (Katie McGrath). The epic superhero crossover kicks off tonight when Barry Allen (guest star Grant Gustin) and Cisco Ramon (guest star Carlos Valdes) seek Kara's help with an alien invasion on their Earth.

Supergirl – "Medusa" airs on November 28 at 8pm ET

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.

The Flash – "Invasion!" airs on November 29 at 8pm ET.

ARROW CELEBRATES 100 EPISODES; THE EPIC SUPERHERO CROSSOVER CONTINUES — Oliver (Stephen Amell) wakes up to a life where he never got on The Queen's Gambit. Robert (guest star Jamey Sheridan) and Moira Queen (guest star Susanna Thompson) are alive and well. Laurel (guest star Katie Cassidy) is his loving fiancée and their wedding is imminent. Everything seems perfect, but Oliver starts to notice small imperfections that make him question this new reality. Meanwhile, Felicity (Emily Bett Rickards) and the recruits take on a new threat with help from The Flash (guest star Grant Gustin) and Supergirl (guest star Melissa Benoist).

Arrow – "Invasion!" airs on November 30 at 8pm ET.

ALL FOR ONE AND ONE FOR ALL IN THIS CROSSOVER OF SUPERHEROS — After learning the Dominators' plan for the world, the Legends must work together with The Flash (guest star Grant Gustin), Supergirl (guest star Melissa Benoist) and Green Arrow (guest star Stephen Amell) to kill them once and for all. Meanwhile, Stein (Victor Garber) figures out, with the help of others, how the team can terminate the Dominators, but is distracted by the aberration he realizes he created in 1987.

DC's Legends of Tomorrow – "Invasion!" airs on December 1 at 8pm ET.

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Next week promises to be quite the TV event, and it's the first time that DC will be beating Marvel to the punch with a TV crossover this big. Supergirl has met The Flash, Arrow has met The Flash and Arrow has met DC's Legends of Tomorrow. But this is the first time that they'll all be together. For fans of these shows, there couldn't be a more exciting storyline, and hopefully it selivers.