Barry asks Green Arrow for help when aliens attack Central City, but when they realize that won't be enough, they bring the Legends and Supergirl in on the battle.



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Episode cast overview, first billed only:


When aliens called the Dominators attack Central City, Barry speeds over to Star City to ask the Green Arrow 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 create a breach to bring back a secret weapon - Supergirl. 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 wants to join the battle against the aliens but Iris tells him he's not ready.

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Release Date:

29 November 2016 (USA)  »

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Technical Specs


Sound Mix:


Aspect Ratio:

16:9 HD
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Did You Know?


Barry tells Kara that she's not the first superhero to be mind-controlled. In the first Flash/Supergirl crossover episode, Kara was dealing with the fallout from being mind controlled by red kryptonite, and Barry recalled when he was controlled in a similar fashion. The latter incident also occurred during a crossover story between the Flash and Arrow. See more »


When Barry introduces Supergirl and she levitates to prove her alien nature, she also uses her heat vision to burn her family crest into the floor behind the rest of the team. No one looks at what she's doing, only looking at her, which they should as, from their positions, her heat vision would have had to cut through Professor Stein. The heat-vision effect was added in post and not originally scripted. Later in story-time, Barry has to explain Kara's heat vision to Oliver quickly in battle, which he should know from the aforementioned introduction. Complicated by that explanation being depicted twice. See more »


[first lines]
Green Arrow: Oh, wow! You really did it this time, Barry.
The Flash: Seriously?
Green Arrow: Yeah, yeah. Yeah, seriously! You to come to Star City, ask for my help, and then, inevitably, immediately, we end up the creek!
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Crazy Credits

The logos for Supergirl, Green Arrow, and the Legends of Tomorrow are added to the credits. See more »


References Supergirl (2015) See more »


The Flash Theme
Written by Blake Neely
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User Reviews

Holy f#&@ing s&#t
30 November 2016 | by See all my reviews

The only thing I need to do right now is slow clap.. My expectations weren't high because Arrow has been going downhill and Supergirl and the Legends are really bad, but this episode was amazing and they totally pulled this crossover thing off. I also loved how they fitted the Flashpoint storyline in there and Barry's message from the future. Looking forward to the next one P.S.: There's no need to watch Supergirl S02E08.. It has nothing to do with the crossover and it was boring as hell

Seriously I don't have anything else to say but I need to pass 10 lines so that my review can be submitted.. Is it OK now IMDb??? Is it long enough??

18 of 23 people found this review helpful.  Was this review helpful to you?

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