The Flash Episode 3x08 "Invasion!" November 29, 2016 (Crossover Event)

THE FLASH
Air Date: Tuesday, November 29, 2016
Time Slot: 8:00 PM-9:00 PM EST on The CW
Episode Title: (#308) "Invasion!"

The Flash, Arrow, Supergirl, DC's Legends of Tomorrow 4 Night Crossover Event

"Invasion!"

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.

Dermott Downs directed the episode with story by Greg Berlanti & Andrew Kreisberg and teleplay by Aaron Helbing & Todd Helbing (#308).

Source: The Flash on The CW | TheFutonCritic

Promo pics for episode 3x08:

T5000 wrote:

Tscc i am not going to watch the 4 part dominator story, I think you will,
so how about a brief summary in the flash thread, and any details I might need to
stay up with flash show.
just answer me in flash thread.

Well, you actually don't need to watch Supergirl 2x08 at all for the crossover. It only started it in its last scene (maybe one and a half minute long), when Barry and Cisco showed up through a portal at Supergirl's place and asked her for help. That scene was then repeated also in the Flash episode 3x08, which actually is part 1 of the crossover called "Invasion!". I continues with Arrow 5x08 "Invasion!" as part 2 and concludes with LoT 2x07 "Invasion!" as part 3.
I've finished the whole thing now with the LoT ep 2x07 and all I can say is, that it was just a lot of fun to watch.
And look at the ratings thread, it looks like the ratings confirm that.
So which eps do you want to skip? The whole crossover? Or only the Arrow and LoT ones?
I think you should watch the whole thing and just consider it a two-hour speacial of The Flash. They deal with the issues of Team Flash, especially the ramifications for the whole "Arrowverse" created by Barry's alternative Flashpoint timeline, throughout the whole crossover and resolve some of that in the LoT crossover finale.
But if you insist on skipping, it's your loss, so you may jump directly to the reviews for each of the three episodes:

The Flash: "Invasion!" Review

Arrow: "Invasion!" Review

DC's Legends of Tomorrow: "Invasion!" Review