All 79 actors in both The 100 and The Flash
79 actors have appeared in both The 100 and The Flash, across 284 episodes. The most-credited is Patrick Sabongui, Sindri in The 100 and David Singh in The Flash.
| Actor | In The 100 | In The Flash | Eps | Eps |
|---|---|---|---|---|
| Patrick Sabongui | Sindri | David Singh | 2 | 45 |
| Richard Harmon | Jonathan Murphy | Owen Mercer | 19 | 5 |
| Stephanie Izsak | Hayden | Officer Daisy Korber, Captain Daisy Korber | 2 | 24 |
| Andre Tricoteux | War Chief #3 | Savitar, Carl Bork | 1 | 11 |
| Neal McDonough | First Disciple Anders | Damien Darhk | 5 | 4 |
| Klarc Jerome Wilson | Disciple | Officer Jones | 1 | 6 |
| Bethany Brown | Jade | Janet Petty / Null | 10 | 2 |
| Chris Shields | David Miller | John Bolen | 11 | 1 |
| Kendall Cross | Major Byrne | Mayor Van Buren | 8 | 2 |
| Luc Roderique | Penn | Jason Rusch | 9 | 1 |
| JoJo Ahenkorah | Costa | Security Guard | 10 | 1 |
| Shaine Jones | Shawn Gillmer | James Zolomon | 5 | 1 |
| Catherine Lough Haggquist | Council Member #1 | Vickie Bolen | 3 | 1 |
| Cassandra Ebner | Klara | Raelene Sharp | 2 | 1 |
| Chad Rook | Hatch | Clyde Mardon | 3 | 2 |
| Fulvio Cecere | Inspector Grus | Officer Vukovich | 1 | 3 |
| Marcus Aurelio | Angry Azgeda Warrior | Guard #1 | 1 | 1 |
| Neil Webb | Wonkru Warrior | Gat | 1 | 3 |
| Shane Symons | Jones | Player #2 | 4 | 1 |
| Chad Riley | Osias | Foreman, Goon #2, Security Guard #1 | 1 | 3 |
| Christiaan Westerveld | Adjustor | Mugger | 1 | 3 |
| James Neate | Chris | Lazarus | 3 | 1 |
| Jason Bell | Scar | Cop #2, Goon #1 | 1 | 3 |
| Reese Alexander | Guard | Museum Guard, Prison Guard #2 | 2 | 2 |
| Teach Grant | Cuyler Ridley | Clark Bronwen | 2 | 1 |
| James Michalopolous | Fio | Security Guard #1 | 4 | 1 |
| Andrew Francis | Boy in Mask | Tony Stewart | 1 | 1 |
| Sean Owen Roberts | Wayne Szybunka | Clay Stanley | 1 | 1 |
| Paul Lazenby | Rockline Warrior, Sidekick | Tech Thief #2 | 4 | 1 |
| Carlo Marks | Cillian | William Seaver | 2 | 1 |
| Alex Barima | Kwame | College Boy | 3 | 1 |
| Charles Zuckermann | Grizzled Warrior | Bert | 1 | 1 |
| Osric Chau | Red Eyed Boy | Ryan Choi | 1 | 3 |
| Seth Whittaker | Langston's Buddy | Security Guard | 3 | 1 |
| Fraser Corbett | Geo Terrorist, Mt. Weather Soldier #2 | Bank Guard | 2 | 1 |
| Anesha Bailey | Young Trikru Woman | Cop #1 | 1 | 1 |
| Birkett Turton | Apprentice | Eddie Slick / Sand Demon | 1 | 1 |
| Chris Robson | August's Dad | Tech #1 / Dr. Jeffrey Shore | 1 | 1 |
| Michael Benyaer | Zahir | Araz | 1 | 1 |
| Peter Flemming | Mark Colton | John Kane | 1 | 1 |
| Sarwan Badesha | Arker | Cop #1 | 1 | 1 |
| Theresa Wong | Eriko's Mom | Lindsay Kang | 1 | 1 |
| Jenna Berman | Karina | McGee's Assistant | 2 | 1 |
| Xander Hall | Command Disciple, Unit Guard | Officer #1 | 2 | 1 |
| Arpad Balogh | Shield Guard Patrol #1 | Robber #1 | 1 | 1 |
| Elizaveta Neretin | Woman (Resistor) | Maria Volkova | 1 | 1 |
| Tommy Europe | Harris | Security Guard | 1 | 1 |
| Dalias Blake | Other Tech | Tough #2 | 1 | 1 |
| Donald Heng | Gabriel II | Tim Kwon | 1 | 1 |
| Gardiner Millar | Scarfaced Grounder | Tony Rawlins | 1 | 1 |
| Kaare Anderson | Man | Middle-Aged Man | 1 | 1 |
| Nathan Barrett | Young Man #1 | Pizza Dude | 1 | 1 |
| Otto Szabo | Person Watching | Bruce | 1 | 1 |
| Zach Martin | Pascal | Fire Fighter #1 | 1 | 1 |
| Jana Mitsoula | Willa | Cop #5, Detective | 1 | 2 |
| Phillip Mitchell | Large Prisoner | Security Guard | 1 | 1 |
| Shayn Walker | Trikru Warrior | Police Armorer | 1 | 1 |
| Jane Craven | Miss Lucy | Rachel Rathaway | 2 | 1 |
| Mat Lo | Nurse Disciple | Caleb Fairweather | 1 | 1 |
| Dagan Nish | Kahlan | Junkie | 2 | 1 |
| Malcolm Masters | Conductor Corbett | Guard #3 | 2 | 1 |
| Jason William Day | Azgeda Warrior | SWAT #2 | 1 | 1 |
| Jesse Stretch | Huge Wonkru Man | Truck | 1 | 1 |
| Lisa Chandler | Observant Guard | Hazmat Woman | 1 | 1 |
| Naiah Cummins | Lead Disciple | Teller | 1 | 1 |
| Patrick Keating | Groundskeeper | Older Man | 1 | 1 |
| Patrick Roccas | Azgeda Scout | Prison Guard | 1 | 1 |
| Samantha Hum | Female Terrorist | Technician | 1 | 1 |
| Serge Jaswal | Brixton Guard | Suit #2 | 1 | 1 |
| Doug Chapman | Big Arker | City Worker #1 | 1 | 1 |
| Mark Krysko | Azgeda Speaking Warrior | Security Guard #1 | 1 | 1 |
| Mikael Vierge | Triumphant Grounder | Crucifer | 1 | 1 |
| Sean Millington | Alpha Reaper | Prison Gang Leader | 1 | 1 |
| Warren Abbott | Ark Jail Guard | Desk Guard #2 | 1 | 1 |
| Suzanne Ristic | Woman | Tenant | 1 | 1 |
| Brendon Zub | Delano | Kyle | 1 | 1 |
| Jarryd Baine | Joaquin | Channel 52 News Reporter | 1 | 1 |
| Will E. McDonald | Wilson | Truck Guard #1 | 1 | 1 |
| Teana-Marie Smith | Greedy Female Prisoner | Dr. Lockett | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.