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The CW’s ‘Heroes vs. Aliens’ Four-Night Crossover Previews: Supergirl, The Flash, Arrow, Legends of Tomorrow

Photo Credit: The CW

The CW’s epic four-night Berlantiverse crossover event featuring Supergirl, The Flash, Arrow and DC’s Legends of Tomorrow begins Supergirl Monday night at 8 PM EST.

In “Medusa,” the eighth episode of Supergirl Season 2, a night of confessions and epic crossover kicks off! 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.

The crossover goodness continues Tuesday, November 29 at 8:00 PM EST on The Flash with a battle of heroes versus aliens in the eighth episode of Season 3, “Invasion.” 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 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 third night of the epic crossover event continues Wednesday, November 30 at 8:00 PM EST on Arrow in the eighth episode of Season 3 (100th episode overall), “Invasion.” 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).

The “Heroes vs. Aliens” crossover concludes on Thursday, December 1 on DC’s Legends of Tomorrow in the eighth episode of Season 2, “Invasion.” 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.

Check out an extended trailer from the crossover below:

Ryan White-Nobles
Ryan White-Nobles is Editor-in-Chief of TV Source Magazine. He's began covering entertainment and soap operas in 2005. In 2009 he co-launched Soap Opera Source, and led the TV Source rebrand in 2012. He's a natural #Heel who loves a spirited debate and probably watches too much TV. Follow him on Twitter at @SourceRyan to discuss all things TV, soaps, sports, wrestling and pop culture.

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1 Comment

  1. I don’t watch Supergirl because the show seems more about relationships the characters aren’t in than anything superhero related. I finally decided to watch the show again because of the crossover and it turned into this strange after-school special feeling episode about lesbians with a second or two of a portal opening up. This isn’t 1980 so I’m not sure how the obviously lesbian character coming out was a big enough deal to fill up a quarter of the crossover episode. And she didn’t know she was a lesbian until another woman had to tell her about it? The whole episode felt like it was written by high-schoolers and didn’t seem to have anything to do with the crossover. If they held that story until the final two minutes I missed it, though, because at about :55 after the hour I walked out of the room.

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