All 206 actors in both 9-1-1 and Castle
206 actors have appeared in both 9-1-1 and Castle, across 316 episodes. The most-credited is Claudia Christian, Captain Elaine Maynard in 9-1-1 and Logan Moore's Mother in Castle.
| Actor | In 9-1-1 | In Castle | Eps | Eps |
|---|---|---|---|---|
| Claudia Christian | Captain Elaine Maynard | Logan Moore's Mother | 19 | 1 |
| Arye Gross | Nathan Levinson | Dr. Sidney Perlmutter | 1 | 17 |
| Danny Nucci | Rick Romero | Gilbert Mazzara, Lance | 10 | 3 |
| Juliana Dever | Rachel Hawkerson | Jenny Ryan | 2 | 8 |
| Geoff Pierson | Lewis Kern | Mr. Smith | 3 | 6 |
| Gregory Harrison | Phillip Buckley | Danny Valentine | 7 | 1 |
| Sasha Roiz | Lou Ransone | Bobby Stark | 6 | 1 |
| Alicia Coppola | Carrie Walsh | Amber Patinelli | 3 | 1 |
| Jordan Belfi | Chase Mackey | Beau Randolph | 2 | 2 |
| Rick Cosnett | Julian Enes | Victor Crowne | 3 | 1 |
| Abby Brammell | Eva Mathis | Carol Thornton | 6 | 1 |
| Aline Elasmar | Dr. Valerie Salazar | Bridget Dantana | 6 | 1 |
| Abigail Spencer | Amber Braeburn | Sarah Reed / Lauren Branston | 2 | 1 |
| Daniel Roebuck | Norman Peterson | Joe Silva | 5 | 1 |
| Josh Stamberg | Detective Ben Hooks | Martin Danberg | 4 | 2 |
| Leonard Roberts | Ronnie Cooper | Special Agent Jason Avery | 3 | 2 |
| Tiffany Dupont | Ali Martin | Greta Mastroianni | 4 | 1 |
| Eric Ladin | Gary | Daniel Sullivan | 1 | 1 |
| Gina Torres | Tommy Vega | Penelope Foster | 1 | 1 |
| Romy Rosemont | Lola Peterson | Nurse Lockhart | 5 | 1 |
| Teri Reeves | Bethanne | Miranda Vail | 1 | 1 |
| Romi Dias | Miranda Williams | ADA Toni Gonzalez | 4 | 1 |
| Eric Nenninger | Brian | John Dessens | 2 | 1 |
| Katherine Kamhi | Dr. Barnes | Lina El-Masri | 1 | 2 |
| Mac Brandt | Eli Cobb | Jeremy | 3 | 1 |
| Jim Holmes | Myron | Dr. Ian Fuller | 4 | 1 |
| Alla Korot | Vicky | Dry Cleaner | 1 | 2 |
| Christopher Cousins | Charles Bryson | Nolan Burns | 1 | 1 |
| Dawnn Lewis | Detective Danvers | Yvonne | 1 | 1 |
| Eddie McClintock | Victor | Rogan O'Leary | 1 | 1 |
| Gonzalo Menendez | Airport Officer | Ronaldo | 1 | 1 |
| Keith Szarabajka | Rory | James Grady | 1 | 1 |
| Krista Allen | Meegan | Naomi Duvray | 1 | 1 |
| Larry Poindexter | Maxwell Fulton | Det. McBride | 1 | 1 |
| Mark Pellegrino | Mitchell Trent | Tom Dempsey | 1 | 1 |
| Patrick Fischler | Hollis Harcourt | Leo | 1 | 1 |
| Rebecca Wisocky | Marjorie Daniels | Dr. Elena Sarkov | 1 | 1 |
| Tom Virtue | Tire Store Employee | Judge Fitz | 1 | 1 |
| Troy Winbush | Nathaniel Green | Marcus Ford | 3 | 1 |
| Colby French | Detective Marks | NYPD Detective | 2 | 1 |
| Doug Savant | Matthew Clark | Trevor Nigel | 2 | 1 |
| Jeryl Prescott | Tina Washington | Nurse | 2 | 1 |
| Lilli Birdsell | Sylvia Mays | Samantha Williger | 2 | 1 |
| Carole Gutierrez | Luann | Dr. Deb Lander | 4 | 1 |
| Brynn Thayer | Evelyn's Grandmother | Penelope Keller | 1 | 1 |
| Catherine Dent | Detective Phelps | Beth Tanner | 1 | 1 |
| Chrystee Pharris | Leo's Mom | Nicky Jay | 1 | 1 |
| Darin Heames | Stan Whitworth | Agent Chuck Martinez | 1 | 1 |
| Derek Phillips | Roger Moss | Reggie Walsh | 1 | 1 |
| Drew Powell | David Cohen | Sam Carson | 1 | 1 |
| Jessica Tuck | Dr. Imelda Royce | Joy McHugh | 1 | 1 |
| Jim O'Heir | Don Blevins | Hal Rossi | 1 | 1 |
| John Eric Bentley | Mark | James Kavanaugh | 1 | 1 |
| Laurie Fortier | Savannah Richards | U.S. Attorney Stephanie Goldmark | 1 | 1 |
| Mercedes Colon | Captain Reyna Ochoa | Philip Lee's Attorney | 3 | 1 |
| Michael Graziadei | Eric Parnell | Brent Johnson | 1 | 1 |
| Nikki DeLoach | Janell Hansen | Annie Klein | 1 | 1 |
| Parisa Fakhri | Bianca | Colette Roth | 1 | 1 |
| Philip Anthony-Rodriguez | Edgar Hill | Michael Grant | 1 | 1 |
| Rebeka Montoya | Leandra Castillo | Ana Rivera | 1 | 1 |
| Robert Costanzo | Jack Kramer | Sal Tenor | 1 | 1 |
| Scottie Thompson | Suzanne Barker | Tildy McGuire | 1 | 1 |
| Tim Russ | Marriage Counselor | Dr. Malcolm Wickfield | 1 | 1 |
| Claudia Choi | ER Nurse | CSU Photo Technician, Video Technician | 1 | 2 |
| David L. King | Dr. Gulati | News Producer | 2 | 1 |
| Elena Campbell-Martinez | Dr. Heller | Mama | 2 | 1 |
| Rick Worthy | Colonel John Hartman | Jason Penn | 2 | 1 |
| Layla Alizada | Stanton | Phoebe | 3 | 1 |
| Ali Hillis | Jen | Megan Brooks | 2 | 1 |
| Charlene Amoia | Dolores Graham | Ana Marie | 1 | 1 |
| Christie Lynn Smith | Candice Baker | Melanie Kopek | 1 | 1 |
| Darin Toonder | Josh | Frankie | 1 | 1 |
| David Meunier | Roman | Sasha | 1 | 1 |
| Frederick Koehler | Carl Gates | Adam Pike | 1 | 1 |
| Heather Mazur | Beth Clark | Gwen Kelly | 1 | 1 |
| Ian Reed Kesler | Ted | Hugo Morrison | 1 | 1 |
| Jack McGee | John "Red" Delacroix | Dale Fickas | 1 | 1 |
| Jackson Hurst | Dan | Harlan Mathis | 1 | 1 |
| James Eckhouse | Abe | Gene Vogel | 1 | 1 |
| James Handy | Felix | Clifford Stuckey | 1 | 1 |
| Joe Williamson | Alex | Charlie Green | 1 | 1 |
| Jonathan Silverman | Walter Schaffer | Alan Masters | 1 | 1 |
| Juan Gabriel Pareja | Garcia | Greg Maxwell | 1 | 1 |
| Kimleigh Smith | Ms. Lorna | Joyce | 1 | 1 |
| Michael Bowen | Winslow Farrier | Sergeant Joseph Ortiz | 1 | 1 |
| Sandra Thigpen | Cynthia | Mrs. Kirby | 1 | 1 |
| Sonya Leslie | Principal Summers | Valerie Thompson | 1 | 1 |
| Sophina Brown | Candace Creedy | Brooke Carver | 1 | 1 |
| Susan Ruttan | Sandy | Eleanor Pike | 1 | 1 |
| Wallace Langham | Brian | Dr. Van Holtzman | 1 | 1 |
| Deborah Strang | Adele Summers | Ruby | 2 | 1 |
| Andy Umberger | Deputy Chief Phil Evans | Johnny Rosen | 1 | 1 |
| Delon de Metz | Recruit Novak | Dave Chambers | 1 | 1 |
| Ella Thomas | Willow | Natasha Piper | 1 | 1 |
| Emil Beheshti | Male Administrator | Dean Seahorn | 1 | 1 |
| Gloria Garayua | Charity Neilson | Kristina Curtis | 1 | 1 |
| Jon Paul Burkhart | Colton | Potential Dewey | 1 | 1 |
| Judy Kain | Trish | Sara | 1 | 1 |
| Lex Medlin | Sean Coopertino | Seth Parrino | 1 | 1 |
| Robert Curtis Brown | Ronald | Ian Busch | 1 | 1 |
| Shane Coffey | Dylan | Sean Tanner | 1 | 1 |
| Vanessa Martinez | Alana Perez | Lara Blanco | 1 | 1 |
| Wendy Davis | Judge Howe | NYFD Lt. Delia Burton | 1 | 1 |
| Brian Tichnell | Max Green | Matt Monroe | 2 | 1 |
| Nikita Bogolyubov | Boris | Grigory Mishkin | 2 | 1 |
| Al Carabello | Diego | Brian Trucco | 1 | 1 |
| Anthony Starke | Brunson | Gary Moore | 1 | 1 |
| Azita Ghanizada | Kelly Wesson | Mistress Sapphire | 1 | 1 |
| Brennan Elliott | Adam | Jason Cosway | 1 | 1 |
| Brian Howe | Harlow | Aaron Lerner | 1 | 1 |
| Crystal Coney | Dr. Friedman | Judy Doyle | 1 | 1 |
| Erin Cahill | Tammy | Cecily Burkett | 1 | 1 |
| Gregg Daniel | Dr. Cochran | Walt Shaw | 1 | 1 |
| J.D. Walsh | Officer Gerrard | John Emerson | 1 | 1 |
| Jason Brooks | Jonathan Prescott | Ian Harris | 1 | 1 |
| Jeanette O'Connor | Nosy Neighbor, Pearl | Dorothy McCabe | 2 | 1 |
| Julie Claire | Denise | Lisa Jenkins | 1 | 1 |
| Larry Sullivan | Dave Kramer | Samuel Lynchberg | 1 | 1 |
| Mandy June Turpin | Doris Claypool | Lee Travis' Sister | 1 | 1 |
| Maya Goodwin | Emergency Nurse | Laura | 1 | 1 |
| Michael A. DiBacco | Bus Driver | Store Owner | 1 | 1 |
| Rob Brownstein | Dr. Burman | Captain Ziering | 1 | 1 |
| Tom Billett | Dallas | Sergio | 1 | 1 |
| Tom Wright | Buck's Doctor | Fats Shepherd | 1 | 1 |
| Diane Mizota | Ann | Newscaster #2, TV Anchor | 1 | 2 |
| Aly Mawji | Devon Wright | Evan | 1 | 1 |
| Brian Maillard | Bill | Joel Mitas | 1 | 1 |
| Carin Chea | Court Clerk | Secretary | 1 | 1 |
| Charlie Bodin | Keith Willits | Julian Cutter | 1 | 1 |
| Chris Cordone | Carl Neilson | Colin Rigsdale III | 1 | 1 |
| Christopher B. Duncan | Paul Creedy | Marcus Weller | 1 | 1 |
| Daniel Edward Mora | Oscar | Silas Mora | 1 | 1 |
| Daryl C. Brown | Asst. US Attorney Lawrence | Jim Boyee | 3 | 1 |
| David Bowe | Dr. Gordon | Max Haverstock | 1 | 1 |
| Devon Gummersall | Sasha | Matt Haley | 1 | 1 |
| Don Franklin | Dave Rothall | Tommy Zane | 1 | 1 |
| Erica Shaffer | Mrs. Gallagher | Extra Reporter | 1 | 1 |
| Greg Bryan | Watch Commander | Alistair Durcoyne | 1 | 1 |
| Herbert Russell | Arborist | Bob | 1 | 1 |
| Jeff Galfer | Soren | Henry Barnett | 1 | 1 |
| Ramón de Ocampo | Wyatt Hawkerson | Owen Peterson | 1 | 1 |
| Sal Viscuso | Anton | Tommy Valentino | 1 | 1 |
| Senta Burke | Officer | Cleaning Lady | 1 | 1 |
| Stephanie Nash | Hallie | Mrs. Herzfeld | 1 | 1 |
| Tommy Savas | Daniel | Marcus Hiatt | 1 | 1 |
| Adrian Quiñonez | Hank | Paul Vail | 1 | 1 |
| Carlos Sanz | Det. Anderson | Manuel Calderon | 1 | 1 |
| Cullen Douglas | Harv | Noah Lewis | 1 | 1 |
| Denise Dowse | Dave's Wife | Judge Gloria Wollcott | 1 | 1 |
| Franco Barberis | SWAT Leader | Francisco Herrara | 1 | 1 |
| Jarrod Crawford | Dr. Hoffmann | Field Tech | 1 | 1 |
| Jason Kelley | Patrick | Event Organizer | 1 | 1 |
| Jeff Harlan | Doctor | Frank Davis | 1 | 1 |
| Jon Curry | Frederick Vaughn | Stan Kopek | 1 | 1 |
| Mark Espinoza | Funeral Attendee | Professor Stevenson | 1 | 1 |
| Tim De Zarn | Cecil Farrier | Bartender | 1 | 1 |
| Annie Little | Jill Evans | Carolyn Decker | 1 | 1 |
| Assaf Cohen | Ellis | Dr. Rusham Haroun | 1 | 1 |
| Corey Mendell Parker | Foreman | Reggie Dyson | 1 | 1 |
| Dash Pomerantz | Ford | Bartender | 1 | 1 |
| Exie Booker | Carl | LAPD Officer | 1 | 1 |
| Francisco Viana | Arbitrator | Manager | 1 | 1 |
| Grace Rowe | Highway Patrol Officer | Reporter #1 | 1 | 1 |
| Jamie Martz | Vern | Male EMT | 1 | 1 |
| Josh Daugherty | Mickey | Trent Wellesley | 1 | 1 |
| Kasey Mahaffy | Lyle | Lance Newman | 1 | 1 |
| Kimberly Fox | Woman | Newscaster | 1 | 1 |
| Mark Elias | Groom | Jeff | 1 | 1 |
| Matt Medrano | Todd Garner | Officer Monfriez | 1 | 1 |
| Michael Cognata | Officer Crawford | Darren Ives | 1 | 1 |
| Patrick Robert Smith | Gabe | Marty Bentley | 1 | 1 |
| Penny Peyser | Older Woman | Mrs. Albrook | 1 | 1 |
| Presciliana Esparolini | Dianne | Teresa De La Torre | 1 | 1 |
| Albert Malafronte | Gregory Abewell | Frank Thomas / Anatoly Arkady | 1 | 1 |
| Brad Benedict | Stefan | Zach Benton | 1 | 1 |
| Brandon Morales | Raymond Dykstra | Cop | 1 | 1 |
| Brian Oblak | Harbormaster | Head of Security | 1 | 1 |
| Christian Gehring | Ian Morgan | Conrad Hayward | 1 | 1 |
| Jeremy Glazer | Ben Watson | Nick Keller | 1 | 1 |
| John Gloria | LAPD Negotiator | Bartender | 1 | 1 |
| Joshua Dov | Ted | Dale Landers | 1 | 1 |
| Michael Dempsey | Officer Dowers | Frank Malloy | 1 | 1 |
| Paul Eric Jerome | Mark | Man #1 | 1 | 1 |
| Samantha Cutaran | Female Uni Cop | Gym Clerk | 1 | 1 |
| Steven M. Gagnon | Percy | Colonel Fortis | 1 | 1 |
| Wilmer Calderon | Benjamin Cowan | Marvin "Oz" Osminkowski | 1 | 1 |
| Adrian Bustamante | Douche Bag | Chris | 1 | 1 |
| Ann Hu | Joanie | Audio Tech | 1 | 1 |
| Bonnie Hellman | Blanche | Frumpy Nightgown Woman | 1 | 1 |
| Brian Allen | Patient | Messianic-Looking Guy | 1 | 1 |
| Charles Remley III | A SWAT Guy | ESU Leader | 1 | 1 |
| Joey Abril | Gang Banger | Bar Bad Guy | 1 | 1 |
| Juan Monsalvez | Mayor | Commander Walsh | 1 | 1 |
| Mario Ardila Jr. | Mario | Gilbert Mendoza | 1 | 1 |
| Mark Bloom | District Attorney Ken Decker | Neal Morris | 1 | 1 |
| Moronai Kanekoa | Lenny | Scott McCoy | 1 | 1 |
| Seth Coltan | George Hurlbutt | Maintenance Worker | 1 | 1 |
| Charles Carpenter | Cedric | Reporter | 1 | 1 |
| Christopher Curry | Flint West | Gaston | 1 | 1 |
| Darren Dupree Washington | Male Firefighter #1 | Security Aide | 1 | 1 |
| Josh Latzer | Garbage Man #2 | Gary Duffin | 1 | 1 |
| Artie O'Daly | Federal Agent | Building Manager | 1 | 1 |
| Celeste Den | Shelly | Julie | 1 | 1 |
| Stefan Ionesco | CSI Tech | Serge | 1 | 1 |
| Anthony Ma | Van | Emcee | 1 | 1 |
| David Atkinson | Farmer Rick McDouglas | U.S. Marshal | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.