Get Ready For Tonight’s DC Crossover Event “Heroes Vs Aliens”

heroes vs aliens

“Heroes VS Aliens”, the CW’s much-anticipated DC crossover event that weaves through Supergirl, Arrow, The Flash, and Legends of Tomorrow, starts tonight with Supergirl. The network has done smaller crossovers before, but this will be the first time all four shows will tell sequential sections of the same story.

Here’s what you need to know to get the most out of the event (without spoilers past what CW has officially put out):

  • The episodes will all air on the CW in the normal 8PM EST time slots for each show. That’s Supergirl tonight, then The Flash on Tuesday, Arrow on Wednesday, and DC’s Legends of Tomorrow on Thursday.
    • A group of aliens called The Dominators are the overall villains for this event. The Dominators were created in 1967 by Jim Shooter, with another outing in the late 80s. They’re a weird group, with really strict social castes and a love of genetic manipulation. I like them for this event- they’re a big, obviously evil bad guy with enough power that the main heroes would believably need help.
  • The storyline will be loosely based on one familiar to comics readers: “Invasion!” In this story, the Dominators decide to wipe out all metahumans by, well, wiping out all humans. Period. From the previews it looks like they’re afraid metahumans will become a threat to their planet, which is ridiculous given how little the metahumans in the Arrowverse reliably cooperate on Earth.
  • Tonight’s Supergirl may technically be the “Heroes Vs Aliens” kickoff event, but most of the episode will be focused around Cadmus and their attempt to destroy all aliens. We do know that Barry Allen (the Flash) and his friend Cisco (AKA Vibe to those who aren’t caught up) will show up at some point to ask for help against the Dominators.
  • Aliens haven’t really been a big part of Arrow at all (though there was once a reference to Hal Jordan). Expect a lot of disbelief and some snarky commentary from the assembled heroes. Kara (Superman’s Kryptonian cousin) is explained by being from an alternate universe, and none of the Arrow team have ever heard of her. Barry Allen actually runs to her ‘verse to bring her back (not blaming him- I would 100% like a Kryptonian bodyguard against evil aliens). We’re not sure yet whether this means Arrow will be dealing with aliens on the regular now, but it certainly opens the door to a lot of larger DC villains the show hasn’t touched yet.

Just in case you haven’t seen the full trailer, treat yourself:


According to the CW, this is how the whole story fits together:

Supergirl: Like I said, Supergirl will be mostly a standalone Cadmus story. That doesn’t mean it’s not going to be relevant to the main arc, though, especially since what Cadmus is working on is a plague that kills aliens. Cisco makes a breach for Barry so he can run to Kara’s world and ask for her help.

The Flash: This is where the main “Invasion!” storyline launches. The Dominators attack Central City. Barry asks his good friend Oliver Queen (AKA Green Arrow) for help. Between them they track down the Legends of Tomorrow and Supergirl, then put together their “Dominators Go Home” plan. CW is teasing that Flashpoint- a huge tangled time crisis caused by Barry’s attempts to change the past- will have a huge bearing on this story, so if you’re behind a few episodes this might be a good day to catch up.

Arrow: As the 100th episode of Arrow, you know the CW had to make this special whether or not it works with “Heroes Vs Aliens”. The synopsis tells us Oliver wakes up in a world where he never became the Green Arrow because he never boarded the ship that originally stranded him, leading to his marooning and his immersion in the very complex mythology of the Arrowverse. While he’s managing that situation (is it a dream? a coma? an alien device?) his team is still helping the Flash and Supergirl handle real life threats. I’m really hoping they don’t sideline Oliver for the whole fight, but it will be fun to see the others try to manage without him.

DC’s Legends of Tomorrow: The gang finds out what the Dominators’ end goal is and realize they have more than the attack on Earth to worry about. Stein finds a way to end the Dominators once and for all, which may or may not have to do with a mysterious aberration he made decades before because the CW makes a point of mentioning said aberration in the synopsis.

If you miss any episodes of the crossover, you can catch up on CW’s website the following day. Also, we’ll be doing reviews of each part of the event.

Are you watching “Heroes VS Aliens”? You can share your opinion online with the hashtag #DCWeek, or let us know what you think in the comments section below!

Author: Khai

Khai is a writer, anthropologist, and games enthusiast. She is co-editor (alongside Alex DeCampi) of and contributor to “True War Stories”, a comic anthology published by Z2 Comics. When she’s not writing or creating games, Khai likes to run more tabletop RPGs than one person should reasonably juggle.


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4 thoughts on “Get Ready For Tonight’s DC Crossover Event “Heroes Vs Aliens”

  1. Part 1 – Supergirl – S02E08
    Part 2 – The Flash – S03E08
    Part 3 – Arrow – S05E08
    Part 4 – DC’s Legends of Tomorrow – S02E07

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