- Matt Ryan - John Constantine
- Matt Ryan - Dr. Gwyn Davies
- Shayan Sobhian - Behrad Tarazi
- Lisseth Chavez - Esperanza 'Spooner' Cruz
- Wentworth Miller - Leonard Snart / Captain Cold
- Wentworth Miller - Leo Snart / Citizen Cold
- Brandon Routh - Ray Palmer / The Atom
- Brandon Routh - Ray Palmer / The Atom / Clark Kent / Superman
- Maisie Richardson-Sellers - Amaya Jiwe / Vixen
- Maisie Richardson-Sellers - Charlie / Clotho
- Maisie Richardson-Sellers - Charlie / Clotho (archive footage) (uncredited)
- Peter Francis James - Dr. Aldus Boardman
- Martin Donovan - Zaman Druce
- Jason Beaudoin - Lewis Snart
- Voytek Skrzeta - Mikhail Arkadin
- Carlos Valdes - Cisco Ramon
- Joseph David-Jones - Connor Hawke / Green Arrow
- Graeme McComb - Young Martin Stein
- Cameron Bancroft - Mr. Blake
- Nick Gracer - Yuri the Bear
- Jamie Andrew Cutler - Grant Wilson / Deathstroke
- Callum Keith Rennie - Captain John Valor
- Stephanie Cleough - Eve Baxter
- Ali Liebert - Nurse Lindsey Carlisle
- Melissa Roxburgh - Betty Seaver
- Laura Mennell - Gail Knox
- Daryl Shuttleworth - Sheriff Bud Ellison
- Levi Meaden - Tommy Fuller
- Matt Nable - Ra’s al Ghul
- Bronwen Smith - Madeline
- Garvin Cross - Stranded Motorist
- Milli Wilkinson - Talia
- Jewel Staite - Dr. Bryce
- Matthew Harrison - Tor Degaton
- Johnathon Schaech - Jonah Hex
- Cory Gruter-Andrew - Per Degaton
- Anna Deavere Smith - Older Kendra
- Anna Galvin - Sarah Neal
- Brent Stait - Jeb Stillwater
- Celia Imrie - Mary Xavier
- Eli Goree - James Jackson
- Jessica Sipos - Cassandra Savage
- Patrick J. Adams - Rex Tyler / Hourman
- Paul Blackthorne - Quentin Lance
- Barbara Kottmeier - Anna Loring
- Aiden Longworth - Young Rip Hunter
- Kyle Rideout - Stein's Father
- Sharon Taylor - Rebel Leader
- Emily Bett Rickards - Felicity Smoak
- Katrina Law - Nyssa al Ghul
- Stacie Greenwell - Beverly Jackson
- John Rubinstein - Albert Einstein
- Kwesi Ameyaw - Charles McNider / Dr. Mid-Nite
- Sarah Grey - Courtney Whitmore / Stargirl
- Christina Jastrzembska - Mileva Maric
- Dan Payne - Obsidian
- Jeff Fahey - Quentin Turnbull
- Sab Shimono - Ichiro Yamashiro
- Stephen Oyoung - Tokugawa Iemitsu / Shogun
- John Churchill - General Ulysses S. Grant
- Alex Barima - Abraham
- Dean S. Jagger - Daniel Collins
- Warren Belle - Henry Scott
- Emily Tennant - Young Clarissa Stein
- Lance Henriksen - Todd Rice / Obsidian
- Lucia Walters - President Susan Brayden
- John Barrowman - Malcolm Merlyn
- Matt Angel - George Lucas
- Boyd Ferguson - Lieutenant Cadwalader
- Noel Johansen - Lt. General Cornwallis
- Katie Cassidy - Laurel Lance
- Simon Arblaster - 'Rip'
- Rebecca Olson - Bank Receptionist
- Jack Turner - J.R.R. Tolkien
- Billy Zane - P.T. Barnum
- Simon Merrells - Julius Caesar
- Nils Hognestad - King Arthur
- Hiro Kanagawa - Director Wilbur Burnett
- Landon Jackle - Kyle Fedak 'Caesar'
- Guy Christie - Manager
- Ruby Gillett - Cadet #1
- Nitin Prasad - Cadet #2
- Aidan Correia - Frat Guy
- Tracy Ifeachor - Kuasa
- Candice Patton - Iris West
- Russell Tovey - Ray Terrill / The Ray
- Sean MacLean - John Swigert
- Joy Richardson - Amaya's Ancestor
- Jack Fisher - Young Ray Palmer
- Celia Massingham - Hedy Lamarr
- Bar Paly - Helen of Troy
- Sam Vincent - Arnold Coleson
- Todd Thomson - Eddie Rothberg
- Andy Thompson - Cecil B. DeMille
- David Sobolov - Gorilla Grodd (voice)
- Evan Jones - Dick Rory
- Katia Winter - Freydis Eriksdottir
- Violett Beane - Jesse 'Quick' Wells
- John Noble - Mallus (voice)
- John Noble - John Noble / Mallus
- Elyse Levesque - Queen Guinevere
- Neil Webb - Sir Galahad
- Patrick Lubczyk - Hank Heywood
- Tim Beckmann - Lt. Robert Maynard
- Adrian Hough - Dr. Bernhard Vogal
- Luke Bilyk - Elvis Presley / Jesse Presley
- Geoffrey Blake - Uncle Lucious
- Erica Tazel - Esi Jiwe
- Kelly Ann Woods - Elvis' Mom
- Cecilia Deacon - Anne Queen
- Meiling Melançon - Masako Yamashiro
- Michael Robinson - Commanding Officer
- Dominic Mariche - Awestruck Kid
- Shane Symons - Jimi Hendrix
- Bruce Crawford - Paul Revere
- Anjli Mohindra - Charlie
- Eijiro Ozaki - Ishiro Honda
- Maggie Sullivun - Grandma Violet
- Andrew Lees - Ernest Hemingway
- Meganne Young - Zelda Fitzgerald
- Jason McKinnon - F. Scott Fitzgerald
- Joyce Guy - Marie Laveau
- Paul Ganus - Richard Nixon
- Susan Hogan - Dorothy Heywood
- Sachin Bhatt - Coachman / Kamadeva / Sanjay
- Adrian Petriw - Friedrich 'Rick'
- Amitai Marmorstein - Vincent
- Jonathan Cake - Blackbeard / Edward Teach
- C. Ernst Harth - Clown
- Echo Kellum - Curtis Holt / Mr. Terrific
- Morgan Brayton - Demon Bank Teller
- Randall Batinkoff - George Washington
- Victoria Souter - Cassandra Austen
- Chyler Leigh - Alex Danvers
- David Harewood - J'onn J'onzz / Martian Manhunter
- Jon Cryer - Lex Luthor
- Rick Gonzalez - Rene Ramirez / Wild Dog
- Juliana Harkavy - Dinah Drake / Black Canary
- Ruby Rose - Kate Kane / Batwoman
- Elizabeth Tulloch - Lois Lane
- Tyler Hoechlin - Clark Kent / Superman
- Stephen Amell - Oliver Queen / Green Arrow
- Stephen Amell - Oliver Queen / Green Arrow / Black Arrow
- Stephen Amell - Oliver Queen (voice)
- Alexa Loo - Hanane
- Charlotte Kavanagh - Judy
- Marin Almasi - Meredith
- Cress Williams - Jefferson Pierce / Black Lightning
- Osric Chau - Ryan Choi
- Reina Hardesty - Joss Mardon / Weather Witch
- Audrey Marie Anderson - Lyla Michaels
- Eileen Pedde - The President of the United States
- Marv Wolfman - Autograph Seeker
- Pam Kearns - Female Fan
- Marcello Guedes - JJ Diggle
- Brec Bassinger - Courtney Whitmore / Stargirl (uncredited)
- April Bowlby - Rita Farr / Elasti-Woman (uncredited) (archive footage)
- Cameron Hilts - Davis Turner
- Cameron Hilts - Davis Hawk-Monster
- Diane Guerrero - Crazy Jane (uncredited) (archive footage)
- Derek Mears - Swamp Thing (uncredited) (archive footage)
- Alan Ritchson - Hank Hall / Hawk (uncredited) (archive footage)
- Joivan Wade - Victor Stone / Cyborg (uncredited) (archive footage)
- Matthew MacCaull - Henry Heywood
- Matthew MacCaull - Commander Steel
- Raúl Herrera - Sargon
- Haley Strode - Jeanie Hill
- Jonathan Sadowski - Benjamin 'Bugsy' Siegel
- David Diaan - Mr. Tarazi
- Beth Riesgraf - Kathy Meyers
- Terry Chen - Genghis Khan
- Neal McDonough - Damien Darhk
- Keiynan Lonsdale - Wally West / Kid Flash
- Rowan Schlosberg - William Shakespeare
- LaMonica Garrett - Mar Novu / The Monitor
- LaMonica Garrett - Anti-Monitor
- Timothy Lyle - Dr. White
- Ben Sullivan - Clyde Barrow
- Matt Letscher - Eobard Thawne / Reverse-Flash
- Matt Letscher - Eobard Thawne
- Abby Ross - Bonnie Parker
- Chris Gauthier - Henry VIII
- Sean Millington - Black Caesar
- Peter Ciuffa - Brutus
- Samantha Cole - Enchantress
- Briana Skye - Silvia 'Sil' Hines
- Jennifer Tong - Inez Martin
- Grant Gustin - Barry Allen / The Flash
- Grant Gustin - Barry Allen (voice)
- Jade Falcon - Lisa Lindhome
- Lillian Doucet-Roche - Mel
- Veronika London - Tiffany Harper
- Kurt Teixeira - Officer Maala
- Joanna Vanderham - Atropos
- Lisa Marie DiGiacinto - Ali
- Sisqó - Sisqó
- Jack Gillett - Declan
- Alice Hunter - Natalie Logue
- Jason Schombing - Mikey T
- Curran Walters - Jason Todd / Robin (uncredited) (archive footage)
- Donny Lucas - Shopkeeper
- Donny Lucas - Time Master Captain #4
- Nick Fontaine - Alumnus
- Sam Darkoh - DJ
- Shawn Roberts - Spartacus
- Cole Vigue - Special Agent Eliot Ness
- Cole Vigue - Eliot Ness
- Cainan Wiebe - Punk #1
- Naiah Cummins - Sandy
- Christian Lagasse - Alien Mascot Guy
- Genevieve Fleming - News Reporter
- Marco Soriano - Da Throne Host
- Kallie Hu - Twin K-Pop Star #1
- Leah McKesey - Fruit Contestant
- Norman Misura - Clerk
- Simone Bailly - Council Member #2
- Christopher Logan - Council Member #3
- Vivian Full - Waitress
- Kory Grim - Terrorist
- Madison Smith - Frat Dude #1
- Braeden Clarke - Frat Dude #2
- Melissa Benoist - Kara Danvers / Supergirl
- Melissa Benoist - Kara Danvers / Supergirl / Overgirl
- Alexandra Voicu - Weirdo Chick
- Courtney Ford - Nora Darhk
- Courtney Ford - Nora Darhk / Marie Antoinette
- Courtney Ford - Nora Darhk (voice)
- Courtney Ford - Marie Antoinette
- Brad Kelly - Scary Biker
- Nicole Major - Sexy Girlfriend
- Greg Zach - Bouncer
- Paul Herbert - Chief Weapons Engineer
- Jaeson Lee - Security Guard
- Wolfgang Klassen - Greyhill Security #1
- Araz Yaghoubi - Palace Guard
- Tommy Europe - Bouncer #1
- Mike Li - Surveillance Nerd #1
- Heidi Ford - Attractive Employee
- Fraser Corbett - Pentagon Guard
- Jojo Ahenkorah - Arm Wrestling Marine
- Frank C. Turner - Ancient Prisoner
- Andre Tricoteux - Boris
- Alexander Mandra - Tunnel Prison Guard
- Raresh DiMofte - Yard Guard
- Ryan Jefferson Booth - Andre
- David Attar - Leather Jacket Thug
- Patrick Sparling - Mirakuru Thug
- Peter Bryant - Declan
- Mackenzie Gray - Council Member #1
- Mackenzie Gray - Time Master
- Andrew Pifko - Gilbert
- Benjamin Wilkinson - Dr. Hannah
- David Wontner - Jock #1
- Douglas Armstrong - Jock #2
- Jennifer Koenig - Snooty Woman
- Andrew Suttar - Soda Shop Owner
- Dominika Zybko - Young Woman
- Madeleine Arthur - Nora Darhk
- Madeleine Arthur - Emily
- Lex Lang - Hawk Creatures (voice)
- Greg Kean - Burt Beeman
- Lauren K. Robek - Rhonda Beeman
- Nancy Amelia Bell - Elderly Woman
- Kerry Sandomirsky - Board Member
- Abiola Uthman - Security Guard
- Justin Doran - Per Degaton Rear Guard
- Timothy Wallace - Robot Programmer
- Nickolas Baric - Hunter #3
- Mike Kovac - Ruffian
- Terry Lewis - Bartender
- Lindsay Marshall - Waitress
- John Novak - Sheriff
- Faye Kingslee - The Pilgrim
- Mitchell Kummen - Young Mick Rory
- Ray Boulay - Kaylex Druzan
- Darcy Hinds - Uniformed Cop
- Giordana Venturi - Stein's Mother
- Donald Sales - Time Master Gatekeeper
- Stephanie Corneliussen - Dr. Valentina Vostok / Soviet Firestorm
- Aidan Dee - Aide
- Sean Kennedy - Aide #2
- Joey Coleman - Time Master Trooper
- Paolo Maiolo - Time Master Captain #1
- Norma Bastidas - Time Master Captain #3
- Alex Duncan - Miranda Coburn
- Kiefer O'Reilly - Jonas
- Steve Blum - Chronos (voice)
- Shane Leydon - Carmine Broome
- Kis Yurij - Arms Dealer
- Blair Penner - U.S. Army Sergeant
- Rebecca Roberts - Queen Anne of Austria
- Tristan Jensen - Bodyguard
- Michael Germant - German Sailor
- David Raynolds - King Louis XIII
- André Eriksen - Baron Krieger
- Ashley O'Connell - French Doorman
- Doug Abrahams - General Gerd Von Runstedt
- Christopher De-Schuster - Guard
- Oliver Rice - Nazi
- Aaron Craven - President John F. Kennedy
- Tim Perez - Fidel Castro
- Eduardo Britto - Military Policeman
- Miguel Castillo - Personal Guard
- Doug Chapman - Robert McNamara
- Ian Farthing - Doug Dillon
- Emilio Merritt - Radar Operator
- Sabrina Sanchez - Cuban Doctor
- Preston Vanderslice - Bobby Kennedy
- Marcel Zadé - Commanding Officer
- Christopher Naoki Lee - Head Samurai
- Christian Keyes - Desmond
- Christian Keyes - Desmond / Neron
- Joshua Hinkson - Plantation Hand
- Ryan McNeill Bolton - Lead Union Soldier
- Aadin Church - Slave
- Ian Hanlin - Survivor
- Dimitri Vantis - Boris
- Darren Matheson - Secret Service Agent
- Ronda Cavanagh - Tour Guide
- Alexander Forsyth - Bartender
- Charles Andre - Guard
- David Lovgren - Head Bandit
- Ross Douglas Noble - Office Manager
- Laura Jacobs - Prostitute
- Joel Cottingham - Searcher
- Donnelly Rhodes - Agent Smith
- Isaac Keoughan - Al Capone
- Sean Campbell - Agent Cole Bennett
- Cameron Dent - Bartender
- Darryl Scheelar - Driver
- Dan Rizzuto - Goon
- Donal Thoms-Cappello - Police Officer
- Jesse Stretch - Biker
- Bruce Blain - Desk Sergeant
- Daniel Letto - 'Vandal'
- Camden Filtness - Lieutenant
- Brad Harder - Teller
- Milo Shandel - Flight Director
- Devin Johnston - Fred Haise
- Jesse Reid - Capcom
- Adam Pateman - Guidance
- Bola Omodara - Security Agent
- Brian Knox McGugan - German Commanding Officer
- Hans Potter - German Soldier
- Jacob Richter - Younger Glasses
- Jacob Richter - Glasses
- Chris Cope - Junior Officer
- Andrea Ware - Volunteer
- Ryan Jinn - Assistant
- Aason Nadjiwan - Police Officer
- Darien Martin - Kaupe
- Darien Martin - Konane / El Lobo
- Darien Martin - Konane
- Jeff Craigen - Security Guard
- Ian Rozylo - German Officer
- Ian Rozylo - Guard
- Glen Gordon - Tobey
- Glen Gordon - Bertie
- Paul Lazenby - Burly Clown
- Robert Underwood - Father
- Shawn Stewart - Large Townie
- Jason William Day - B'Wana Beast
- Dalias Blake - Guard
- Rick Pearce - Transport Officer
- Gerald Paetz - Transport Driver
- Phillip Mitchell - Argus Officer
- Susie Abromeit - Mrs. Palmer
- Cissy Jones - Dominator Queen (voice)
- Marc Graue - Gumball (voice)
- Paul Becker - Runner
- Joel Sturrock - Shooter
- Missy Cross - Walkie
- Scott Seol - Lab Assistant
- Jonathan Alexander - Lab Assistant
- Apollo Scott - Orphan
- John Shaw - Coroner
- Sean Tyson - Grip
- James Ralph - Set Decorator
- Jared Payne - Wiry Guard
- Dianne Doan - Anh Ly
- Peter Hall - Lyndon B. Johnson
- Christine Lippa - Marie Curie
- Blake Stadel - General
- Christopher Coutts - Petey Adams
- Eric Mazimpaka - Grodd Soldier
- Matt Kennedy - Convoy Soldier 01
- Isabella Hofmann - Clarissa Stein
- Christina Brucato - Lily Stein
- Charles Zuckermann - Nazi Commander
- Adam Klassen - Nazi Navigator
- Susanna Thompson - Earth X Gideon (voice)
- Thor Knai - Leif Erikson
- Scott Patey - Chuck
- Tara Pratt - Woman
- Daniel Chai - Store Manager
- Richard Stroh - Viking Brother
- Darryl Quon - Mr. Wu's Nephew
- Darryl Quon - Scary Drunk Guy
- William Ford Hopkins - Follower
- Annabel Marshall-Roth - Young Dr. Moore
- Marilyn Norry - Dr. Ellen Moore
- Kelly Metzger - Doctor
- Craig Fraser - Attendant
- Andrew Morgado - Voice of Lord Knoxacrillion (voice)
- Andrew Morgado - Gary Junior / Hell Hound / Marchosias (voice)
- Jason Vaisvila - One-Eyed Pirate
- Eanna O'Dowd - Scottish Pirate
- Aaron Paul Stewart - Barkeep
- Chris Carson - Alan
- Nicolas Ouellette - Border Guard
- Eric Breker - Driver
- Ian Hawkins - Evening Wear Man
- Tyson Arner - First Finger
- Tyson Arner - Nerdy Cadet
- Marie V. Sharp - Evening Wear Woman
- Joel Montgrand - Sheriff
- David Quinlan - Producer
- Lisa Paxton - Old Lady
- Jess Harnell - Elvis Vocal Impersonator (voice)
- Bodhi Sabongui - Behran
- Ava Kelders - Girl
- Bailey Tippen - Astra (voice)
- Maria J. Cruz - Mrs. Veras
- Raf Rogers - Spanish Man
- Eli Gabay - Chuck McCabe
- Jan Bos - Randy Sharpe
- Iris Quinn - Pam Sharpe
- Lovell Adams-Gray - Barry Obama
- Nakai Takawira - Young Kuasa
- Rob McEachern - Jerry Garcia
- Dean Hinchey - Newscaster
- Bree Woodill - Anti-War Woman
- Michael Mitton - Scared Hippie
- Kasey Kieler - Witness
- Art Kitching - Philip Henslowe
- Art Kitching - Nazi Commandant
- Tim Zhang - Waiter
- Kurtis Maguire - Villager 1
- Natasha Quirke - Villager 2
- Nevis Unipan - Puritan Child 1
- Zenon Brown - Puritan Child 2
- Natalie Moon - Mary Anne
- Chris Walters - Thomas
- Bernard Cuffling - Majordomo
- Mark Gash - EBC Anchor
- Rosie Frier-Dryden - Old Lady
- Trish Allen - Paula Cooper
- Ben Diskin - Beebo (voice)
- Ben Diskin - Beebo (voice) (uncredited)
- Koyu Rankin - Randall
- Cody Davis - Zack
- Geraldine Chiu - Alexis
- Whitney Peak - Lenise
- Christopher Thomas - Tony
- Darcy Michael - Steve
- Anthony David Moyer - Chupacabra
- Gary Peterman - Uncle Rich
- Jaden Oehr - Tyson
- Tom Cavanagh - Dr. Harry Wells / Eobard Thawne / Reverse-Flash
- Tom Cavanagh - Harrison 'Nash' Wells
- Sergio Osuna - Salvador Dali
- Daniel Deorksen - Django Reinhardt
- Craig Haas - Marcel
- Ron Selmour - Xavier
- Katrina Reynolds - Female Slave
- Gwenda Lorenzetti - Queen Elizabeth III
- Mia Bella - Little Girl
- Wesley MacInnes - Red
- Aaron Joseph - Drunk Man
- Frank Gallegos - El Cura
- Winnie Hung - Lien Wu
- Peter Chan - Zhao Wu
- Sophia Johnson - Bride
- Sophia Johnson - Pretty Boss
- Deborah Finkel - Foundation Rep
- Víctor Ayala - Announcer
- Robert Hayley - Scared Soldier
- Robert Hayley - Cop
- Andres Collantes - Referee
- Andrew Nadanyi - Time Bureau Agent
- Wolsey Brooks - Mysterious Agent
- Shaughnessy Redden - Agent London
- Timothy Paul Coderre - Aide
- Jay Clift - Secret Service Agent
- John Prowse - Cop
- Kharytia Bilash - Choir Singer #2
- Kharytia Bilash - Church Choir #2
- Lesley Mirza - Waitress
- Cassidy Karin - RV Girl
- Jenna Rosenow - Jane Austen
- Eliza Norbury - Cousin Patty
- Jessica Smith - Time Bureau Agent
- Jessica Smith - Nerdy Agent
- Danielle Panabaker - Caitlin Snow / Killer Frost
- Danielle Panabaker - Caitlin Snow
- Sinead Curry - Gentlewoman
- Brendan Riggs - Groom
- Anastasia Bandey - Bride's Mother
- Terry O'Sullivan - Aunt Tilda
- Nima Gholamipour - Megastör Employee
- Brenda Matthews - Old Sarah Lance
- Althea McAdam - Old Ava Sharpe
- John Murphy - Gordon Gilchrist
- Mike Desabrais - Ze Surgeon
- Alexander J. Baxter - Mummy
- Jaycie Dotin - Tammy
- Dylan Archambault - Commuter
- Dylan Archambault - Demon Receptionist
- Dale Willman - Audience #1
- Kiomi Pyke - Audience #2
- Ryan Moss - Guard
- Naomi Levi - Agent Reyes
- Madeleine Kelders - Agent Powell
- Paul Reubens - Dybbuk (voice)
- Jason Simpson - Calibraxis
- Beau Daniels - Satan
- Mel Tuck - Belial
- Bill Croft - Beelzebub
- Daniel Cudmore - Minotaur
- Jocelyn Ott - Marilyn Monroe
- James Kot - Agent Neil McNeil
- Kevan Kase - Audience Member
- Bailey Corneal - Lip Piercing
- Bailey Corneal - Crowd Member
- Reese Alexander - Time Bureau Agent
- Megan Hui - Ama Diver
- Megan Hui - Hoyan
- Tiffany Mo - Reporter
- Tiffany Mo - Reporter #1
- Jane Carr - Fairy Godmother
- Sandy Sidhu - Nasreen
- Natasha Vasiluk - Baba Yaga
- Gracelyn Awad Rinke - Young Zari
- John DeSantis - Ogre
- Deni DeLory - Mrs. Appleby
- Ronin Wong - Ranking Senator
- Rhys Slack - Bratty Kid
- Jeff Gladstone - New Teller
- Nic Bishop - Levi Stapleton
- Nic Bishop - General Kilgore
- Nic Bishop - Mike the Strike
- Nicole Maines - Nia Nal / Dreamer
- Falk Hentschel - Carter Hall / Hawkman
- Falk Hentschel - Joe Boardman
- Jorden Birch - Worker
- Kron Moore - Dr. Chapel (uncredited)
- Sisa Grey - Wolfie
- Michael Eklund - Grigori Rasputin
- Adam Beauchesne - Kevin Harris
- Callum Seagram Airlie - Edgar
- Paul Batten - Senator Wellington
- Luisa Jojic - Tsarina Alexander
- Clare Filipow - Nurse
- Gregory Tunner - Giant Bouncer
- Clayton James - Officer Sullivan
- Mark Brandon - Police Chief
- Harrison MacDonald - Masher (voice)
- Harrison MacDonald - Masher
- Sarah Johns - Blue Iguana Guest
- Bianca Caroca - Henchwoman
- Pascal Lamothe-Kipnes - Young Ali
- Seth Meriwether - Freddy Meyers (1984)
- Garrett Quirk - Freddy Meyers
- Jasmine Vega - Young Tiffany
- Samuel Braun - Young Brad
- Dan Zukovic - Warden
- David Jacox - Coroner
- David Ramsey - John Diggle / Spartan
- David Ramsey - Bass Reeves
- Knox Hamilton - Young John
- Shayn Walker - Alex Logue
- Ali Seifi - Goon #1
- Melanie Rose Wilson - Les-Lay
- Riley Shanahan - Cliff Steele / Robotman (uncredited) (archive footage)
- Mitra Lohrasb - Nasreen Tarazi
- Mike Gill - Tosh.0-Style Talk Show Host
- Melody Nosipho Niemann - Young Astra
- Melody Nosipho Niemann - Young Astra Logue
- Matthew Zuk - Larry Trainor / Negative Man (uncredited) (archive footage)
- Troy Mundle - Drunk Man
- Teagan Croft - Rachel Roth / Raven (uncredited) (archive footage)
- Devyn Dalton - Púca
- Johnny M. Wu - Blogger
- Robin Atkin Downes - The Bulldog (voice)
- Colin Foo - Mr. Wu
- Ryan Beil - DJ S'More Money
- Chris Robson - Prince Charles
- Thomas F. Wilson - Henry 'Hank' Heywood
- Nicholas Harrison - Bodyguard
- Robert Corness - Accountant / Tiberius
- Robert Corness - Accountant
- David Soo - Tattooed Guard #1
- Leo Chiang - Triad Member
- Madeline Hirvonen - Pippa
- Liam Howe - Sexy Fireman
- Riley Orr - 'Atom' Actor
- Jesse Inocalla - 'Heat Wave' Actor
- Brett Harris - 'Captain Steel' Actor
- Levi Wall - Mohawk Punk
- Josh Bogert - Kirk
- Yasmeen Kelders - Frightened Child
- Scarlett Jando - Lita at 8, 9 & 10 Years Old
- Marion Eisman - Mrs. Hughes
- Stephanie George - Handmaiden
- Drew Ray Tanner - Dion / Dionysus
- Dan Zachary - Astra's Heavy
- Sarah Strange - Lachesis
- Elijah Silva - Mikey
- Angela Galanopoulos - Terri Neuman
- Raylene Harewood - Tour Guide
- Carson Schiefner - Sigma Member
- Steve James - Bus Driver
- Riley Davis - Soldier
- Charmaine Wilson - Wife
- Erik Gow - Mr. Parker
- Jillian Zavazal - Production Assistant
- Aria DeMaris - Gilly
- Tom Kirk - Earnest Worshipper
- Kate Boutilier - Young Female Worshipper
- Artin John - Ian
- Rob Jacobsen - Fanboy Worshipper
- Jason Bell - Loom Guard #1
- Kerën Burkett - Businesswoman
- Derek Kwan - Businessman
- Seth Ranaweera - Citizen #2
- Russell Roberts - Robert Truss
- Jeff Sanca - Cabbie
- Ambika Vas - Vendor
- Jennifer Oleksiuk - Amelia Earhart
- Jagen Johnson - Pizza Guy
- Thomas Nicholson - David Bowie
- AnnaLynne McCord - Irma Rose
- Duane Keogh - Singing Cowboy Narrator
- Toby Hargrave - Desperado
- Mike Wasko - Prospector
- Joel Wirkkunen - Barkeep
- Mina Sundwall - Lita
- Conor Stinson O'Gorman - Reece
- Conor Stinson O'Gorman - Junkie Looking Demon
- Saad Siddiqui - Kamran Saeed
- Shawn Ahmed - Imran Saeed
- Tarun Keram - Faiz
- Louis Lay - Niko
- Moire Kiyingi - Staff Writer
- Carmen Lavigne - Executive Producer
- Hannah Sandhu - Assistant
- Helenna Santos - Casting Director
- Matt Lucas - Aleister Crowley (voice)
- Ricardo Ortiz - Fernando
- Leo Rano - Captain Noriega
- Andres Soto - El Gato
- Andy Canete - Old Farmer
- Melissa Farman - Noelle
- Cynthia Mendez - Marisa
- Alvin Sanders - Buddy
- Gavin Langelo - Jeff
- Jenna Romanin - Jamie
- Robbie Segulam - Red Shirt Bowler #2
- Angie Chen - Red Shirt Bowler #3
- Steve Bacic - Doc
- Dominique Lucky Martell - Young Esperanza 'Spooner' Cruz
- Chris West - Henry
- Aliyah O'Brien - Kayla
- Andrew Wheeler - Sheriff Thomas Wood
- Anthony Ingram - Pastor Hanson
- Toby Marks - Woman
- Vera Ann Frederickson - Young Girl
- Jocelyne Loewen - Female Passerby
- Ryan Irving - Teller
- Alexandra Castillo - Gloria Cruz
- Sean Kuling - Agent Rodgers
- Arpad Balogh - Agent Donovan
- Rick Dobran - Tony
- Vladimir Raiman - Igor Lewandoski
- Amber Lewis - Woman in Furs
- Ken Godmere - Ticket Taker
- Carey Feehan - Banker
- Warren Chow - Academic
- Nevin Burkholder - Angry Passenger
- Tina-Marie Springham - Rich Lady
- David Beairsto - Rich Man
- Jesse Peachment - The Mr.
- Tavia Cervi - The Mrs.
- Donovan Wolf - Working Class Passenger
- Aubrey Reynolds - Maude Beaumont
- Hamza Fouad - Eddie
- Sage Brocklebank - Ross Bottoni
- Eva Tavares - Suzie
- Michael Connor - Pianist
- Giacomo Baessato - J. Edgar Hoover Bot
- Giacomo Baessato - J. Edgar Hoover / J. Edgar Hoover Bot
- Giacomo Baessato - J. Edgar Hoover
- Kevin Mundy - Donny
- Neil Charlesworth - Record Executive
- Stephanie Cho - Seamstress
- Amira Anderson - Maid
- Raffi Barsoumian - Bishop
- Raffi Barsoumian - Bishop / Bishop Clone
- Raffi Barsoumian - Bishop / Younger Bishop
- Chris Britton - Thomas Edison / Thomas Edison Bot
- Matt Clarke - Erwin George 'Cannon Ball' Baker
- Charles Siegel - Sweet Old Man
- Eric Regimbald - Police Officer
- Eric Gustafsson - Shady Young Man
- Brian McCaig - Doctor
- Kimleigh Smith - Female Worker
- Jason Gray-Stanford - E. Staples
- Michael Charrois - Aristocrat
- Michael Charrois - Prussian General
- Michele Goyns - Abby
- Michael P. Northey - George
- Clay St. Thomas - Colonel Dawson
- Christine Willes - Eleanor Roosevelt
- Heidi Bauman - Friendly Rosie
- Dario Giordani - Military Police
- Claire Traille - Rosie #2
- Ego Mikitas - General Kalashnik
- Dante Swain - Time Reporter
- Stefanie von Pfetten - Dr. Irina Petrov
- Atlee Smallman - Small Kid
- Andrei Kovski - Irina's Contact
- Giles Panton - Harris Lede
- Anna Barker - Camera Person 1
- Marc Gaudet - Archduke Franz Ferdinand
- Mark Krysko - Second Finger
- Keara Barnes - Sophie, Duchess of Hohenberg
- Dan Ginnane - Time Traveller
- Timothy Webber - The Proprietor
- Rady Panov - Gavrilo Princip
- Trezzo Mahoro - Hotshot #1
- Anthony Timpano - Hotshot #2
- Timothy Daniel Selby - Young Sarajevan
- Erin Mudry - Sarajevan with Tablet
- Tom Forbes - Alun Thomas Bot
- Tom Forbes - Alun Thomas / Alun Thomas Bot
- Lily Yawson - Interviewer
- Donald Faison - Mike / Booster Gold
- David Chin - Time Master Guard
- Nick Preston - Shoe Shiner
- Mark James - Squire
- Mark Bruner
- Mercedes Valle
- Leah Poulliot
- Emily Cheever
- Marcelena Mayhorn
- Morgan Faust
- James Eagan
- David Rapaport
- Ray Utarnachitt
- Marc Guggenheim
- Jennifer Nickson
- Blake Neely
- Joel D. Catalan
- Mark A. Lanza
- Daniel James Chan
- Season Kent
- Matthew Cameron
Callum Keith Rennie hace el papel de Captain John Valor.
Thomas F. Wilson interpreta a Henry 'Hank' Heywood en la serie.
Evan Jones interpreta a Dick Rory en la serie.
John Noble hace el papel de John Noble / Mallus.
Wentworth Miller hace el papel de Leo Snart / Citizen Cold.
Lance Henriksen hace el papel de Todd Rice / Obsidian.
Neal McDonough hace el papel de Damien Darhk.
Billy Zane hace el papel de P.T. Barnum.
Caity Lotz interpreta a Sara Lance / White Canary en la serie.
Tala Ashe hace el papel de Zari Tarazi.
Capítulo disponible en las siguientes plataformas:
