Legends of Tomorrow: Invasion! Season 2, Ep 7
The crossover event concludes with the Legends, the Flash, Supergirl, and Green Arrow working together to defeat the alien Dominators once and for all. Meanwhile, Stein figures out how the team can terminate the Dominators, but he's distracted by the abberation he realizes he created in 1987. [more inside]
Arrow: Invasion! Season 5, Ep 8
The crossover continues with Oliver waking up to a life where he never got on the Queen's Gambit, Robert and Moira Queen are alive and well, and his wedding to Laurel is imminent. Meanwhile, Felicity and the recruits take on a new threat with help from the Flash, Supergirl, and Cisco. [more inside]
The Flash: Invasion! Season 3, Ep 8
The crossover event continues with aliens attacking Central City and Barry asking the Green Arrow for help to stop them. But they soon realize the battle is bigger than they thought, so they track down the Legends of Tomorrow and Supergirl to help. 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. [more inside]
The Flash: Legends of Today (Part 1) Season 2, Ep 8
In the first episode of a two-part crossover that will conclude in the next episode of Arrow, Vandal Savage arrives in Central City and sets his sights on Kendra Saunders. [more inside]
Arrow: My Name is Oliver Queen Season 3, Ep 23
Everyone's lives are in danger as Ra's al Ghul puts forth his final plan. Oliver/Al Sah-him must decide if he's strong enough to take on this new role and what it will mean for everyone on Team Arrow, and his soul. [more inside]
The Flash: Who Is Harrison Wells? Season 1, Ep 19
Joe and Cisco head to Starling City to continue their investigation of Dr. Wells. While in town, the duo enlists the help of Captain Lance, and Cisco meets the Black Canary, who asks him for a favor. Meanwhile, back in Central City, Barry races to catch a meta-human named Hannibal Bates who can transform himself into every person he touches – which includes Eddie, Iris, Caitlin and even The Flash.
The Flash: All-Star Team Up Season 1, Ep 18
Barry is surprised when Felicity Smoak arrives from Starling City along with her boyfriend, Ray Palmer, who flies in as the Atom. They've come to visit S.T.A.R. Labs as Ray needs help with his suit. Their timing turns out to be fortuitous because it’s all hands on deck after a meta human named Brie Larvin unleashes hundreds of robotic bees to attack and kill her former co-workers, including Dr. Tina McGee. A group dinner with Barry, Felicity, Ray, Iris and Eddie turns into a disaster.
Arrow: The Brave and the Bold Season 3, Ep 8
Part 2 of the Flash/Arrow crossover. Part 1 is The Flash: Flash vs. Arrow, in which Oliver & the team visited the Flash to ask for S.T.A.R. Labs' assistance in analyzing a boomerang used as a murder weapon. Now, back in Starling City, tracking the boomerang winds up putting Arrow into the middle of an A.R.G.U.S. operation. [more inside]