Crisis on Earth-X, Part 4

"We can't bring Marty back, but we can protect the city he loved, and the family he left behind."

- Atom to the heroes

Synopsis
Barry and Iris's wedding brings the gang together, but things go awry when villains from Earth-X attack the ceremony. All of the superheroes band together with help from their super friends like Citizen Cold, The Ray, Felicity Smoak, Iris West and Alex Danvers to take on their most formidable villains yet. Earth's mightiest heroes - Green Arrow, Supergirl, The Flash and White Canary - lead their teams into battle to save the world.

Protagonists

 * Legends
 * Firestorm (Martin Stein)
 * Atom (Ray Palmer)
 * White Canary (Sara Lance)
 * Firestorm (Jefferson Jackson)
 * Vixen (Amaya Jiwe)
 * Gideon
 * Zari Tomaz
 * Steel (Nate Heywood)
 * Heat Wave (Mick Rory)
 * Team Arrow
 * Green Arrow (Oliver Queen)
 * John Diggle
 * Overwatch (Felicity Smoak)
 * Mister Terrific (Curtis Holt)
 * Wild Dog (Rene Ramirez)
 * Black Canary (Dinah Drake)
 * Team Flash
 * Harry Wells
 * Iris West-Allen
 * Killer Frost (Caitlin Snow)
 * Vibe (Cisco Ramon)
 * The Flash (Barry Allen)
 * Super Friends
 * Alex Danvers
 * Supergirl (Kara Zor-El)
 * Freedom Fighters
 * Leo Snart
 * The Ray (Ray Terrill)

Antagonists

 * Cupid (Carrie Cutter)
 * Freedom Fighters
 * Red Tornado
 * Nazi Party
 * New Reich
 * Schutzstaffel
 * Reverse-Flash (Eobard Thawne)
 * Wellenreiter A.I.
 * Overgirl (Kara)
 * Metallo
 * Dark Arrow (Oliver)
 * The Leviathan

Other Characters

 * Andy Diggle
 * Carly Diggle
 * Clarissa Stein
 * Felicity Smoak's Grandfather
 * Felicity Smoak's Grandmother
 * Mengele
 * Kendra Saunders
 * Leonard Snart
 * Lily Stein
 * Lily Stein's Boyfriend
 * Maggie Sawyer
 * Mick Rory (Earth-1)
 * Ronnie
 * Ronnie Raymond
 * Mister Terrific (Terry Sloane)

Teams and Organizations

 * Central City Police Department
 * Freedom Fighters
 * Legends
 * Nazi Party (Earth-1)
 * Nazi Party (Earth-X)
 * New Reich
 * Schutzstaffel
 * Super Friends
 * Team Arrow
 * Team Flash

Species

 * Artificial Intelligence (Earth-1)
 * Artificial Intelligences (Earth-X)
 * Cyborgs (Earth-X)
 * Ghosts
 * Humans (Earth-1)
 * Humans (Earth-38)
 * Humans (Earth-X)
 * Kryptonians (Earth-38)
 * Kryptonians (Earth-X)
 * Metahumans
 * Robots (Earth-1)
 * Robots (Earth-X)
 * Time Remnants

Objects and Concepts

 * ATOM Exosuit
 * Dwarf Star Alloy
 * Black Canary Suit
 * Breach/Temporal Gateway
 * CFL Quark Matter
 * Citizen Cold Suit
 * Citizen Cold Goggles
 * Cold Gun
 * Dark Arrow Suit
 * Dark Arrow's Bows and Arrows
 * Firestorm Cure
 * Quark Spheres
 * Firestorm Suit
 * Firestorm Matrix
 * Quantum Splicer
 * Killer Frost Suit
 * Green Arrow Suit
 * Heat Gun
 * Inter-Dimensional Extrapolator
 * Kara Danvers' Glasses
 * Mister Terrific Suit
 * Oliver Queen's Bow and Arrow
 * Overgirl Suit
 * Pulse Rifle
 * Reverse-Flash Suit
 * Supergirl Suit
 * Kal-El's Blanket
 * T-Spheres
 * Terminator
 * The Flash Suit
 * The Ray Suit
 * Totems of Zambesi
 * Air Totem
 * Spirit Totem
 * Vibe Suit
 * Vibe Goggles
 * Vibe Gauntlets
 * Vixen Suit
 * Waverider
 * White Canary Suit
 * Wild Dog Suit
 * Zari Tomaz's Suit

Locations

 * Earth-X
 * Earth
 * North America
 * United States of America
 * Washington
 * Star City
 * New Reich Facility
 * Earth-1
 * Earth
 * North America
 * United States of America
 * Missouri
 * Central City
 * S.T.A.R. Labs Central City Facility
 * Pipeline
 * Time Vault
 * Stein Residence
 * North Dakota
 * Salvation
 * Washington
 * Star City
 * Bunker
 * Earth-38