‘The Flash’ season 3’s episode 8, entitled “Invasion!”, will follow Barry as he enlists the help of fellow superheroes including Green Arrow and Supergirl in order to defeat invading aliens called Dominators.
The synopsis for “Invasion!” posted on Cartermatt reads, “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 incoming episode is poised to be the third crossover event for The CW’s “Arrowverse” and is inspired by the original DC comic book miniseries of the same name, published in 1989. According to Collider, ‘Supergirl’ season 2’s episode 8 “Medusa” set up the huge crossover event, which officially begins in ‘The Flash’ season 3’s episode 8. It will continue on ‘Arrow’ season 5’s episode 8 and will conclude on ‘Legends of Tomorrow’ season 2’s episode 7.
Barry is set to call upon his allies Oliver Queen a.k.a. Green Arrow, Kara Danvers a.k.a. Supergirl, and the Legends of Tomorrow in order to fight off the Dominators before the alien antagonists destroy all of Central City. However, the superheroes are sidetracked from their real mission when a secret relating to the Flashpoint is revealed, which causes distrust among the group.
‘The Flash’ season 3’s episode 8, entitled “Invasion!”, is scheduled to air on The CW on November 29, 2016. It was directed by Dermott Downs with a story by Greg Berlanti and Andrew Kreisberg and teleplay by Aaron Helbing and Todd Helbing. It will be followed by episode 9, entitled “The Present”, scheduled for December 6.
