Arrowverse Crossovers Event Ratings

The Arrow comes to Central City in pursuit of a felon. Barry hopes to team up, but a meta-human who can control emotions turns one against the other.

With boomerang-wielding killer Digger Harkness targeting Lyla and A.R.G.U.S. agents, Oliver enlists the help of his old friend, The Flash.

Vandal Savage sets his sights on Kendra Saunders, forcing Barry to hide Kendra in Star City with Oliver and Team Arrow.

Oliver and Barry hide Kendra Saunders and Carter Hall in a remote location while they figure out how to defeat Vandal Savage.

Kara gains a new ally when the Flash arrives from a parallel universe and helps her fight the Silver Banshee and Livewire in exchange for helping him return home.

As Eliza comes to National City for Thanksgiving, Kara turns to Lena for help when Cadmus unleashes a virus that instantly kills aliens, then is asked by Barry Allen and Cisco Ramon for help with an alien invasion on their Earth.

When aliens called the Dominators attack Central City, Barry asks for help from the Green Arrow, the Legends, and Supergirl.

Oliver finds himself in a life where he never became the Green Arrow. Meanwhile, Felicity and the recruits take on a new threat with help from The Flash and Supergirl.

The Legends work with The Flash, Supergirl and Green Arrow to kill the invaders; while working out how to defeat the Dominators, Stein gets distracted by the aberration he created in 1987.

The Music Meister sends Supergirl and the Flash to a world where life is a musical and the only way to escape is to sing and dance.

The gang comes together for Barry and Iris's wedding, but the ceremony is crashed by villains from Earth-X.

When villains from Earth-X attack the wedding ceremony of Barry Allen and Iris West, The Green Arrow, Supergirl, The Flash and White Canary lead their teams to save the world.

When villains from Earth-X attack the wedding ceremony of Barry and Iris, the Green Arrow, Supergirl, The Flash and White Canary unite their teams to save the world.

The gang comes together for Barry and Iris's wedding, but the ceremony is crashed by villains from Earth-X.

When Barry and Oliver Queen wake up to realize they have swapped bodies with each other, the two set off with Supergirl to find out what caused such a shift in the timeline.

Oliver, Barry and Supergirl head to Gotham City to figure out why their reality changed. They get information from Kate Kane/Batwoman.

Supergirl, The Flash, Green Arrow and Superman face the battle of their lives.

The Monitor sends Harbinger to gather the worlds' greatest heroes - Supergirl, The Flash, Green Arrow, Batwoman, White Canary, The Atom and Superman - in preparation for the impending Crisis. With their worlds in imminent danger, the superheroes suit up for battle while J'onn and Alex recruit Lena to help them find a way to save the people of Earth-38.

The group uses Ray's invention to track new recruits to help save the universe. The Monitor sends Iris, Clark and Lois in search of a mysterious Kryptonian, while Kate and Kara head out to find Bruce Wayne. In addition, Mia challenges Sara, Rory discovers a hidden talent, and Lex Luthor returns.

Pariah enlists Black Lightning to help stop the Anti-Monitor. Oliver and Diggle return to a familiar place.

Stuck in the Vanishing Point, the Paragons search for a way to escape; Oliver reveals that he has become something else; the origin stories for The Monitor and Anti-Monitor are revealed.

Worlds lived, worlds died. Nothing will ever be the same.