Crisis on Infinite Earths: Part One

The episode is the first part of the five-part crossover,.

Main/Featured Characters

 * Team Arrow
 * Green Arrow (Oliver Queen)
 * Green Arrow (Mia Smoak)
 * Superfriends
 * Alex Danvers
 * Brainiac 5
 * Dreamer (Nia Nal)
 * Martian Manhunter (J'onn J'onzz)
 * Supergirl (Kara Zor-El)
 * Legends of Tomorrow
 * Atom (Ray Palmer)
 * White Canary (Sara Lance)
 * Alura Zor-El
 * Batwoman (Kate Kane)
 * Flash (Barry Allen)
 * Harbinger (Lyla Michaels)
 * Lena Luthor
 * Lois Lane
 * Pariah (Nash Wells)
 * Superman (Kal-El)
 * The Monitor

Villains

 * Anti-Monitor (mentioned)
 * Shadow Demons (first appearance)
 * Doomsday (first appearance) (mentioned)
 * General Zod (mentioned)
 * Lex Luthor (mentioned)
 * Spike
 * Superman (John Deegan) (flashback)
 * Wonderland Gang
 * Alice (mentioned)

Other Characters

 * Alana (mentioned)
 * Alexander Knox
 * A.M.A.Z.O (flashback)
 * Batman (mentioned)
 * Cisco Ramon (mentioned)
 * Daxamites (mentioned)
 * Dominators (flashback)
 * Dick Grayson
 * Doomsday Protester (first appearance)
 * Eve Teschmacher (mentioned)
 * Felicity Smoak (indirectly mentioned)
 * Green Arrow (Oliver Queen)
 * Hawk (first appearance)
 * Iris West-Allen (mentioned)
 * James Olsen (mentioned)
 * Janis Joplin (mentioned)
 * Joker (mentioned)
 * Jonathan Kent
 * Kelly Olsen
 * Leviathan (mentioned)
 * Malefic (mentioned)
 * President Plastino (mentioned)
 * Red Tornado (flashback)
 * Robin (first appearance)
 * Sara Lance (mentioned)
 * The Ray
 * Trivia Host (first appearance)
 * William Clayton (mentioned)

Organisations

 * D.E.O.
 * Gotham City Gazette (first appearance)
 * Gotham City Savings & Loans (first appearance)
 * The Legion
 * National City Tribune (first appearance)
 * USGS (first appearance) (mentioned)

Locations

 * Earth-1
 * Central City
 * Gotham City
 * Arkham Asylum (flashback)
 * Star City
 * Lian Yu
 * Earth-2 (mentioned)
 * Earth-9
 * San Francisco (first appearance)
 * Earth-16
 * Star City
 * Arrowcave
 * Lian Yu (mentioned)
 * Earth-38
 * Solar System (mentioned)
 * Sun (on screen)
 * Mercury (on screen)
 * Venus (on screen)
 * Earth
 * National City
 * CatCo Worldwide Media
 * D.E.O.
 * Quantum Tower
 * Mars (on screen)
 * Jupiter (on screen)
 * Saturn (on screen)
 * Uranus (on screen)
 * Argo City
 * Krypton (mentioned)
 * Earth-66
 * Gotham City
 * Earth-89
 * Gotham City
 * Earth-X
 * The Monitor's Realm
 * Infinite Universes (mentioned)