The CW's Super Heroes team up for this season's epic four-series DC Crossover Event. Based on DC's Invasion! series featuring an alien race known as the Dominators, the mega "Arrowverse" crossover, follows The Flash and the team at S.T.A.R. Labs as they join up with Team Arrow, Supergirl and the Legends of Tomorrow to fight off the extraterrestrial menace threatening Earth's very survival.

Episodes Included: The Flash S3 Episode 8: Invasion! Arrow S5 Episode 8: Invasion! DC's Legends of Tomorrow Episode 7: Invasion!

PLUS 3 featurettes!

Allied: The Invasion Complex (The Flash) Explore the story behind the crossover event! This first of 3 consecutive documentaries takes us on Barry Allen's quest to bring the various Superheroes together to fight a galactic menace that is bent upon taking over the Earth.

Allied: The Invasion Complex (Arrow) Every Crossover event needs a moment where the hero is tested. Here's the 2nd part of the consecutive documentary series where Oliver battles his inner demons and galvanizes his team against the malevolent alien armanda!

Allied: The Invasion Complex (DC's Legends of Tomorrow) The showdown! Superheroes vs the Dominator Alien threat! This is the knockout drag out brawl where the might of the heroes clashes with the power behind the alien force. In this third crossover-documentary will DC's Legends, Arrow, and The Flash vanquish the evil and save Earth Prime?