Crisis on Infinite Earths: Part Five

"Crisis on Infinite Earths: Part Five" is a special episode episode of the 5 undefined season of, and the 68 undefined episode overall. It aired on January 14, 2020. The episode is the fifth and final part of the five-part crossover,.

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

Starring

 * Brandon Routh as Ray Palmer/The Atom and Superman
 * Caity Lotz as Sara Lance/White Canary
 * Maisie Richardson-Sellers (credit only)
 * Courtney Ford (credit only)
 * Jes Macallan as Ava Sharpe
 * Olivia Swann (credit only)
 * Amy Louise Pemberton (credit only)
 * LaMonica Garrett as Mobius/Anti-Monitor
 * Nick Zano as Nate Heywood
 * Dominic Purcell as Mick Rory/Heat Wave

Special appearance by

 * Matt Ryan (credit only)
 * Jon Cryer as Lex Luthor
 * Marv Wolfman as Marv Wolfman

Special guest star

 * Grant Gustin as Barry Allen/The Flash
 * Rick Gonzalez as Rene Ramirez/Wild Dog
 * Juliana Harkavy as Dinah Drake
 * Cress Williams as Jefferson Pierce/Black Lightning
 * David Ramsey as John Diggle/Spartan
 * Tom Cavanagh as Harrison Nash Wells/Pariah
 * Danielle Panabaker as Caitlin Snow/Frost
 * Chyler Leigh as Alex Danvers
 * David Harewood as J'onn J'onnz/Martian Manhunter
 * Nicole Maines as Nia Nal/Dreamer
 * Tyler Hoechlin as Clark Kent/Superman
 * Elizabeth Tulloch as Lois Lane
 * Ruby Rose as Kate Kane/Batwoman
 * Melissa Benoist as Kara Danvers/Supergirl

Guest starring

 * Osric Chau as Ryan Choi
 * Reina Hardesty as Joslyn Jackam/Weather Witch
 * Audrey Marie Anderson as Lyla Michaels
 * Eileen Pedde as President

Featuring

 * Stephen Amell as Oliver Queen (voice)

Co-starring

 * Jorden Birch as Co-Worker
 * Pam Kearns as Female Fan
 * Raul Herrera as Sargon the Sorcerer
 * Marcello Guedes as JJ Diggle
 * Tiahra Allen as Baby Sara Diggle

Uncredited

 * Brec Bassinger as Courtney Whitmore/Stargirl
 * Alan Ritchson as Earth-9 hooded vigilante
 * Diane Guerrero as Crazy Jane
 * April Bowlby as Rita Farr
 * Joivan Wade as Victor Stone

Production

 * Production for began on September 24, 2019.
 * Filming for the crossover had completed by November 8, 2019, with some reshoots and minor filming still needing to be completed.
 * Production for this particular part began on October 4, 2019.

Trivia

 * This episode was originally produced as the eighth episode of the fifth season of but aired prior to the official Season 5 premiere as a special episode.
 * This is the first episode of to not feature  or  after signing on as series regulars. Additionally, neither are credited at the start of the episode.
 * The synopsis has similarity with Roger Hayden's catchphrase in.
 * This part in addition to both aired on Grant Gustin's thirtieth birthday.
 * The Super Friends cartoon theme plays at the end. Additionally, an open cage has the name Gleek on it. Gleek is known for being the pet monkey of the Wonder Twins.
 * Eileen Pedde previously appeared played a doctor in the episode.
 * Only the Paragons initially remembering the Crisis is a callback to the original comic, where only the key players in stopping the Crisis remembered.
 * Earth-Prime is a reborn Earth-1 fused with Earth-38 and Black Lightning's Earth.
 * This is also another nod to the comic Crisis, where the last three Earths in existence were merged into New Earth.

Behind the Scenes

 * The creation of Earth-Prime allows more diverse stories for Flash, Supergirl and Black Lightning, as now metahumans are available for Supergirl stories (which primarily focused on aliens) and aliens for Flash and Black Lightning (which primarily had metas).