All 423 actors in both 9-1-1 and NCIS
423 actors have appeared in both 9-1-1 and NCIS, across 651 episodes. The most-credited is Debra Christofferson, Sue Blevins in 9-1-1 and Rita Gregg, Uta in NCIS.
| Actor | In 9-1-1 | In NCIS | Eps | Eps |
|---|---|---|---|---|
| Debra Christofferson | Sue Blevins | Rita Gregg, Uta | 37 | 2 |
| Claudia Christian | Captain Elaine Maynard | Belgian Vsse Officer Louise Moreau | 19 | 1 |
| Scottie Thompson | Suzanne Barker | Jeanne Benoit | 1 | 18 |
| Lou Ferrigno Jr. | Tommy Kinard | Dave Lancellotti | 15 | 1 |
| Connie Jackson | Fatima | Elaine | 1 | 11 |
| Corinne Massiah | May Grant | Ricki Evans | 11 | 1 |
| Kent Shocknek | National News Anchor | ZNN News Anchor Guy Ross | 1 | 11 |
| Danny Nucci | Rick Romero | Gordon Fremont | 10 | 1 |
| J. Claude Deering | Hoyt | Curtis Hubley | 1 | 9 |
| Dee Wallace | Margaret Buckley | Claire Hall | 7 | 1 |
| Gregory Harrison | Phillip Buckley | Navy Captain Roland Ebbakey | 7 | 1 |
| Marco Sanchez | Medical Tower Manager | Alejandro Rivera | 1 | 7 |
| Brian Thompson | Capt. Vincent Gerrard | Master Chief Vince Nutter | 13 | 1 |
| Melinda McGraw | Bonnie Sheets | Diane Sterling | 1 | 6 |
| Sasha Roiz | Lou Ransone | NCIS Agent Rick Hall | 6 | 1 |
| Kiara Muhammad | Kianna Harris | Kayla Vance | 1 | 5 |
| La Monde Byrd | David Hale | Marine Captain Rand Kraus | 11 | 1 |
| Ana Mercedes | Isabel Diaz | Glenda | 10 | 1 |
| Gabrielle Walsh | Ana Flores | NIS Special Agent Michelle Stamos | 10 | 1 |
| Francis X. McCarthy | Thomas | Roman Parker | 1 | 4 |
| Richard Brooks | Chief Simpson | Lieutenant Colonel Walsh | 9 | 1 |
| Doug Savant | Matthew Clark | Larry Clannon, Marine Brigadier General Daniel Kent | 2 | 2 |
| John Hensley | David | Phil Hanover | 1 | 3 |
| Juliette Goglia | Hudson Groupie | Evelyn Shaw | 1 | 3 |
| Leonard Roberts | Ronnie Cooper | P.O. Howard Carter | 3 | 1 |
| Mariette Hartley | Patricia Clark | Hanna Lowell | 7 | 1 |
| Victoria Kelleher | Reyna | NCIS Accountant Barbara Dunsley | 1 | 3 |
| Abby Brammell | Eva Mathis | Marine Sergeant Heather Dempsey | 6 | 1 |
| Aline Elasmar | Dr. Valerie Salazar | Annie Hankamer | 6 | 1 |
| Noah Bean | Jeffery Hudson | DOD Chief David Barbado | 5 | 2 |
| Andi Chapman | Diedra | Congresswoman Bernice Donaldson | 9 | 1 |
| Alicia Coppola | Carrie Walsh | Faith Coleman | 3 | 3 |
| Daniel Roebuck | Norman Peterson | Port Security Chief Matthew Lake | 5 | 1 |
| Ian Reed Kesler | Ted | Mark Daniels, Police Officer Howard Shelly | 1 | 2 |
| Jeanette O'Connor | Nosy Neighbor, Pearl | Teri | 2 | 1 |
| Louise Barnes | Rochelle | Sarah | 2 | 4 |
| Tim Russ | Marriage Counselor | Dr. Erik Harper, Jerry Kemper | 1 | 2 |
| Connor Trinneer | Jessie | James Dempsey | 4 | 1 |
| Ellen Hollman | Tara d'Agostino | NCIS Special Agent Tina Larsen | 3 | 2 |
| Tiffany Dupont | Ali Martin | Kimberly Nolan | 4 | 1 |
| A.J. Tannen | Rodney | Mossad Agent, Grant Lancaster | 1 | 3 |
| Abbie Cobb | Josephine "Jo" | Melanie Keller | 1 | 1 |
| Amanda Clayton | Walter's Lawyer | Lieutenant Rachel Donahue | 1 | 1 |
| Charles Carpenter | Cedric | Sheriff Marcus Mayes | 1 | 1 |
| Christian Clemenson | Franklin | Perry Sterling | 1 | 1 |
| David DeLuise | Tom Gladden | Michael Franklin | 1 | 1 |
| Eddie Jemison | Doctor Gibson | Terry Spooner | 2 | 2 |
| Geoff Pierson | Lewis Kern | Roy Carver | 3 | 1 |
| James Eckhouse | Abe | Fred Cabrisio | 1 | 1 |
| Mark Atteberry | Doctor | Medgar Nash | 1 | 1 |
| Nick Searcy | Father Jameson | Joseph Barnes | 1 | 1 |
| Nikki DeLoach | Janell Hansen | Army Lieutenant Colonel Maya Leland | 1 | 1 |
| Rob Benedict | Oswald "Ozzie" Smith | Aaron Alan Wright | 1 | 1 |
| Stepfanie Kramer | Janet | Sandra Holdren | 1 | 1 |
| Briana Venskus-Vazquez | Dawn | Joanna | 4 | 1 |
| Dante Brown | Darius | Skip | 4 | 1 |
| Josh Stamberg | Detective Ben Hooks | Marine Major Ike Varnai | 4 | 1 |
| Mark Derwin | Captain Thomas | Marine Major Bradley Raines | 4 | 1 |
| Asante Jones | Jack Tannor | Homicide Detective Andy Kochofis | 1 | 2 |
| Brian Hallisay | Jason Bailey | David Crocker | 5 | 1 |
| David Pressman | Chester Caulfield | Dave Siebel, Lewis Dacey | 1 | 2 |
| Deborah Strang | Adele Summers | Diane Warner | 2 | 1 |
| Eric Nenninger | Brian | Navy Corpsman Taylor Henley | 2 | 1 |
| Jack McGee | John "Red" Delacroix | Det. Floyd, Richard "Rick" Jordan | 1 | 2 |
| Jean St. James | Cheryl Sullivan | Marilyn Davis | 1 | 2 |
| Jeryl Prescott | Tina Washington | Annie Sullivan | 2 | 1 |
| Lauren Stamile | Ellie | Metro P.D. Detective Michelle Lane | 2 | 1 |
| Matthew Yang King | Trauma Surgeon | Michael Chang, Min Ho Kwon | 1 | 2 |
| Victoria Platt | Sergeant Barnett | NCIS Special Agent Veronica "Ronnie" Tyler | 1 | 2 |
| Chris Johnson | Trey Walsh | PO James Morgan | 3 | 1 |
| Karl Makinen | Officer Brogan McCluskey | Marine Staff Sgt. James Dawson | 3 | 1 |
| Mac Brandt | Eli Cobb | Jake Spoke | 3 | 1 |
| Rick Cosnett | Julian Enes | Sean Parks | 3 | 1 |
| Jessica Gardner | Staff Member | Olivia Kahn | 1 | 4 |
| Amber Friendly | Dr. Helen Green | Eden Greyson | 3 | 1 |
| Anthony Starke | Brunson | Derrick Choyce | 1 | 1 |
| Ashley Jones | Holiday Traveler | Nancy Douglas | 1 | 1 |
| Brian Howe | Harlow | Sherriff Tom Barrett | 1 | 1 |
| Brynn Thayer | Evelyn's Grandmother | Adams County Sheriff's Department Sheriff Mary Talbot | 1 | 1 |
| Charlene Amoia | Dolores Graham | Denise Mancuso | 1 | 1 |
| Christopher B. Duncan | Paul Creedy | CIA Officer Dale Harris | 1 | 1 |
| Christopher Cousins | Charles Bryson | Jordan Jones | 1 | 1 |
| David Meunier | Roman | Wade Cutler | 1 | 1 |
| Don Franklin | Dave Rothall | FBI Agent Ron Sacks | 1 | 3 |
| Gabriela Quezada Bloomgarden | Sophia Diaz | Petty Officer Hart | 1 | 1 |
| Galadriel Stineman | Nina Sutton | Resident Sierra Krueger | 1 | 1 |
| George Wyner | Don | Randall Worthington | 1 | 1 |
| Grace Narducci | Lisa Barker | Nicole | 1 | 1 |
| Jackson Hurst | Dan | Zach Nelson | 1 | 1 |
| Jeff Pierre | Emmett Washington | Lew Nolte | 1 | 1 |
| Jessica Tuck | Dr. Imelda Royce | Gloria Caplinger | 1 | 1 |
| Jim Holmes | Myron | Edgar Hayes | 4 | 1 |
| John Marshall Jones | Dave Morrisey | Detective Hanley | 3 | 1 |
| Kelly Smith | Nora Jane Curtis | Emily Miller | 1 | 1 |
| Kim Estes | Clive Wexler | Minister | 2 | 1 |
| Lyndon Smith | Kate | Navy Lieutenant Rebecca Weeks | 1 | 1 |
| Matthew Bellows | Rescue Leader | Navy Captain Reginald Barkley | 1 | 1 |
| Mike Farrell | William "Bill" Schneider | Judge Miles Deakin | 1 | 2 |
| Randy J. Goodwin | Skydiving Pilot | Clark Anderson, Defense Lawyer | 1 | 2 |
| Rick Otto | Detective Newell | Adrian Nelson | 1 | 1 |
| Rio Mangini | Parker Straiton | Ned | 3 | 1 |
| Scott Speiser | Vincent d'Agostino | Agent Rafi Ali | 3 | 1 |
| Skye P. Marshall | Sonia Moss | Sara Carter | 1 | 1 |
| Steven Culp | Henry Wallace | Navy Cmdr. William Skinner | 1 | 1 |
| Tim De Zarn | Cecil Farrier | David Runion | 1 | 1 |
| Todd Giebenhain | Dean | Leo Vairo | 1 | 1 |
| Travis Schuldt | Sam Egan | Freddy Martin, Paul Miller | 1 | 2 |
| Troy Winbush | Nathaniel Green | Former Marine 1st Lieutenant Sam Keeler | 3 | 1 |
| Christopher Allen | Allen | Overdose Victim | 4 | 1 |
| Reggie Austin | Glenn | Navy Lieutenant Carlton Mane, Peter Braden | 2 | 2 |
| Craig Welzbacher | Tour Guide | George Mansur, Motel Guest | 1 | 2 |
| Gino Anthony Pesi | Sal Deluca | Doug Fisher | 2 | 1 |
| Isabella Hofmann | Dr. Copeland | Judge Evelyn Wallace, Kate Reynolds | 1 | 2 |
| Jama Williamson | Det. Anita Mercer | Angelina Jennings | 2 | 1 |
| Joseph Lyle Taylor | Marty Collins | Detective Edward Olson | 2 | 1 |
| Lilli Birdsell | Sylvia Mays | Jill Reynolds | 2 | 1 |
| Maurice Irvin | Wendall | Navy Commander Daly | 2 | 1 |
| Michael Garza | Milo Garner | Reymundo De Leon | 1 | 2 |
| Michael Monks | B. Johnson | Edgar, Matt Lane | 1 | 2 |
| Pilar Holland | Uniformed Officer | Colonel Lucia Campbell | 1 | 2 |
| William Russ | Chuck Summers | Philip Wickes | 2 | 1 |
| Blake Berris | Rennie | Walter Shibberd | 1 | 1 |
| Brennan Elliott | Adam | Martin Stillwell | 1 | 1 |
| Chelsea Alden | Keisha | Navy Petty Officer Third Class Stephanie Vairo | 1 | 1 |
| Chloe Lanier | Deena | Emma Carter | 1 | 1 |
| Dalila Ali Rajah | Julia Saxton | Connie Falco | 1 | 1 |
| Deanne Lauvin | Young Beatrice | Rebecca Haswell | 1 | 1 |
| Dendrie Taylor | Magda | Janet LaCombe | 1 | 1 |
| Ella Thomas | Willow | Heidi | 1 | 1 |
| Frederick Koehler | Carl Gates | Simon Gravy | 1 | 1 |
| Heather Mazur | Beth Clark | Laura Strike-DePalma | 1 | 1 |
| Jason Gray-Stanford | Andrew Schneider | Dr. Jay Berman | 1 | 1 |
| Jessica Collins | Christina Gallagher | Judy Ford | 1 | 1 |
| John Eric Bentley | Mark | Captain Arthur Caldwell | 1 | 1 |
| Jonathan Del Arco | Craig | Ned Senders | 1 | 1 |
| Jonathan Medina | Assistant Chief Jaime De La Cruz | Navy Commander Ted Morgan | 1 | 1 |
| Jonathan Sadowski | Ivan VanPelt | Lt. Norski | 1 | 1 |
| Judy Kain | Trish | Gladys Stone | 1 | 1 |
| Julie Claire | Denise | Lois Heller | 1 | 1 |
| Karina Logue | Sara Kramer | Mrs. Johnson | 1 | 1 |
| Krishna Smitha | Zainab | Dr. Carrie Moran | 1 | 1 |
| Livia Treviño | Property Manager | Lupe | 1 | 1 |
| Mark Bloom | District Attorney Ken Decker | Dr. Marley | 1 | 1 |
| Max Adler | Sam | Luke Stana | 1 | 1 |
| McKinley Freeman | Darryl | Marine Sergeant Ross Barnes | 1 | 1 |
| Mercedes Colon | Captain Reyna Ochoa | Gina | 3 | 1 |
| Nanrisa Lee | Ticket Agent | Inspector General Regina Ward | 1 | 1 |
| Patrick Fischler | Hollis Harcourt | George Stenner | 1 | 1 |
| Rachel Rosenbloom | Tessa | Frances Bates | 1 | 1 |
| Rebecca Wisocky | Marjorie Daniels | Jody Carvell | 1 | 1 |
| Sarah Chaney | Amy Olson, Supervisor | DIA Agent Collins | 3 | 1 |
| Shane Blades | Tom | Tony | 1 | 1 |
| Shane Coffey | Dylan | Sean Greco | 1 | 1 |
| Sonya Leslie | Principal Summers | Nancy | 1 | 1 |
| Sophina Brown | Candace Creedy | Navy Reserve Lieutenant Callie Daniels | 1 | 1 |
| Teya Patt | Ely | Park Ranger Marge | 1 | 1 |
| Thomas Crawford | Joseph | Doctor Walter Magnus | 1 | 1 |
| Tommy Hinkley | Dermott Miller | Deer Hunter | 1 | 1 |
| Tommy Savas | Daniel | Max Sanders | 1 | 1 |
| Ali Hillis | Jen | Antonia Morello | 2 | 1 |
| Boise Holmes | Hal | Security Guard, Security Supervisor | 1 | 2 |
| Catherine Dent | Detective Phelps | Former NCIS Special Agent Whitney Sharp | 1 | 2 |
| Christian Gehring | Ian Morgan | Lieutenant Mason Winslow, Metro Police Officer Owen Tamblin | 1 | 2 |
| David L. King | Dr. Gulati | Zullow Senior Vice President Lance Rama | 2 | 1 |
| LaNisa Renee Frederick | Kath, Mom | Diana Roday | 2 | 1 |
| Melissa Greenspan | Olivia | Mother, NTSB Agent Melanie Bass | 1 | 2 |
| Michael Whaley | Commander Bowman | Detective J.D. Morris | 2 | 1 |
| Rick Worthy | Colonel John Hartman | Navy Captain Logan Doyle | 2 | 1 |
| Sean O'Bryan | Charlie Nash | David Shields | 2 | 1 |
| Daryl C. Brown | Asst. US Attorney Lawrence | Navy Commander Lovinder Prasad | 3 | 1 |
| Andrew Asper | Boyfriend | Mitch Greyson | 1 | 1 |
| Annie Little | Jill Evans | Merri Dade | 1 | 1 |
| Ashley Platz | Jennifer | Kat Hanna | 1 | 1 |
| Carole Gutierrez | Luann | Woman | 4 | 1 |
| Charlie Bodin | Keith Willits | Keith Messier | 1 | 1 |
| Christie Lynn Smith | Candice Baker | Cara Barnsway | 1 | 1 |
| Darin Toonder | Josh | Curt Shapiro | 1 | 1 |
| Devika Parikh | Sharlo Darzi | Doctor Saanvi Singh | 1 | 1 |
| Donzaleigh Abernathy | Joanne Kingston | NSA Deputy Director Ronda Ellis | 1 | 1 |
| Dorian Brown | Emily | FBI Special Agent Courtney Krieger | 1 | 1 |
| Eric Allan Kramer | Kendall's Dad | Phillip Ekkerly | 1 | 1 |
| Erica Luttrell | Bailey | Allison Asher | 1 | 1 |
| Erin Cahill | Tammy | Navy Lieutenant Jessica Summers | 1 | 1 |
| Gregg Daniel | Dr. Cochran | Parking Enforcement Officer Riggs | 1 | 1 |
| Heather Olt | Social Worker, Val | Groundskeeper | 2 | 1 |
| Jason Kelley | Patrick | Marine Master Sergeant Ramsey Dillon | 1 | 1 |
| Javier Grajeda | Chief Alonzo | Dr. Kelly Whelan | 1 | 1 |
| Jenny O'Hara | Nora Curtis | Alice Brodie | 1 | 1 |
| John Lacy | Officer Reynolds | Park Ranger Kett | 1 | 1 |
| Larry Poindexter | Maxwell Fulton | Dr. Berman | 1 | 1 |
| Larry Sullivan | Dave Kramer | Flight Surgeon | 1 | 1 |
| Mandy Levin | Incident Control Commander Janet Reese | Shirley Ives | 1 | 1 |
| Marianne Muellerleile | Mrs. Ulyanov | Nurse Hannah Dunstan | 1 | 1 |
| Mark Espinoza | Funeral Attendee | Sheriff Lester | 1 | 1 |
| Mark Lawson | Pilot Joe | Young Roman | 1 | 1 |
| Matthew Jones | Zoo Sharp Shooter | Navy Commander Rick Odwalla | 1 | 1 |
| Michael Graziadei | Eric Parnell | Chuck | 1 | 1 |
| Miki Ishikawa | Paralegal | Molly Stoll | 1 | 1 |
| Paloma Esparza Rabinov | Barb | Sober Sally | 1 | 1 |
| Patricia Bethune | Carol | Paulette Quinn | 1 | 1 |
| Rich Ceraulo Ko | Officer Reyes | North Carolina State Trooper Muncie Tyson | 1 | 1 |
| Rick Kelly | Jason Summers | Navy Capt | 1 | 1 |
| Sally Ann Brooks | Judy | Margaret Scott | 2 | 1 |
| Shari Belafonte | Shirley | Professor Annabel Davis | 1 | 1 |
| Stephanie Lemelin | Stella | Melody Hanson | 1 | 1 |
| Susan Ruttan | Sandy | Samantha "Sammy" Delfino | 1 | 1 |
| Terryn Westbrook | Nancy Cook | County Deputy Regina Unger | 1 | 1 |
| Tony Sancho | ER Doctor Kenner | Mitch Monroe | 1 | 1 |
| Troy Blendell | Bernie | Bernard Wilson | 1 | 1 |
| Wolé Parks | Glenn | Navy Captain Michael Laramie | 1 | 1 |
| Peter Jang | Firefighter Logan | Navy Commander James Willis | 3 | 1 |
| Beth Fraser | Mary | Reporter #1 | 2 | 1 |
| Dominic Pace | Fight Promoter | George Barlow, Vincent Pazzo | 1 | 2 |
| Lawrence Pressman | Mitchell | Dr. Russell Pike, Secret Service Director | 1 | 2 |
| T.J. Linnard | Russ | Logan Chase | 2 | 1 |
| Abby Awe | Marley | Lucy | 1 | 1 |
| Al Coronel | LAFD Battalion Chief Navarro | Metro P.D. Lieutenant Wilton Buck | 1 | 1 |
| Audrey Wasilewski | Joan Wallace | Shirley Wilkes | 1 | 1 |
| Briana Lane | Storm | Diane Boyle | 1 | 1 |
| Cesili Williams | Manager | Vera | 1 | 1 |
| Chad Doreck | Sean | Leo | 1 | 1 |
| Chelsea Harris | Amari Sharpe | Danielle Benton | 1 | 1 |
| Chris Cafero | Martin | StratComm Advisor Cooper Ellis | 1 | 1 |
| Christine Dunford | Sadie | Jeri Fleckman | 1 | 1 |
| Corey Mendell Parker | Foreman | Metro Police Officer Bilik | 1 | 1 |
| Dale Godboldo | Elton | Cy | 1 | 1 |
| Dan Martin | Doctor | Mail Carrier | 1 | 1 |
| Drew Powell | David Cohen | Fred Hadley | 1 | 1 |
| Eric Ladin | Gary | P.O. Thompson | 1 | 1 |
| Gabriel Burrafato | Hugh Foster | Reverend Edward Pike | 1 | 1 |
| Gabrielle Carteris | Suzie Price | Julie Bell | 1 | 1 |
| Iris Bahr | Arlene | Beverly Berkshire | 1 | 1 |
| Jamie Martz | Vern | Petty Officer First Class Marc Hobie | 1 | 1 |
| Jason Ko | Van Tourist #2 | NCIS Special Agent James Chen | 1 | 1 |
| Jeff Galfer | Soren | CIA Case Officer Victor Hodge | 1 | 1 |
| Jeremy Glazer | Ben Watson | Douglas Pritchard | 1 | 1 |
| Jesse Bush | Jesse | Frank Ressler | 1 | 1 |
| John Rubinstein | Melvin | Bob | 1 | 1 |
| JoNell Kennedy | Dr. Thompson | Navy Commander Lisa Cleveland | 1 | 1 |
| Josh Daugherty | Mickey | Devon Kane | 1 | 1 |
| Kasey Mahaffy | Lyle | Doctor Patton Hartgrave | 1 | 1 |
| Kate Orsini | Jane | FBI Special Agent Isabel Monet | 1 | 1 |
| Kenajuan Bentley | Ibrahim | Navy Captain Oliver Royce | 1 | 1 |
| Larry Bagby | Carwash Manager | Craig Wilson | 1 | 1 |
| Lou Beatty, Jr. | Reggie Franklin Sr. | Issac Curtis | 1 | 1 |
| Merrick McCartha | Chief Pate | Doctor Eugene Pierce | 1 | 1 |
| Nancy Youngblut | Cynthia | Joanna "Mama Jo" Dalton | 1 | 1 |
| Patrick W. Day | Kimmel | Phil Iverson | 1 | 1 |
| Philip Anthony-Rodriguez | Edgar Hill | Former Marine LCPL Lloyd Jackson | 1 | 1 |
| Rickey Eugene Brown | Keith Assaud Cruz | Navy Petty Officer Third Class Ed Thomas | 1 | 1 |
| Robert Costanzo | Jack Kramer | Jimmy Napalitano | 1 | 1 |
| Seth Coltan | George Hurlbutt | Deputy Allen Smedley | 1 | 1 |
| Stephanie Erb | Miranda Filson | Rachel Nasry | 1 | 1 |
| Wes Brown | Officer Jones | Marine First Lieutenant Jeremy Nolan | 1 | 1 |
| Zach Tinker | Officer Matthew Sparks | David West | 1 | 1 |
| Zachary S. Williams | Tino | Logan Kennedy | 1 | 1 |
| Charles Remley III | A SWAT Guy | Homeland Security Agent #3, Navy Chief #1 | 1 | 2 |
| Tyler Ross | Brandon Skinner | Adam Horne | 2 | 1 |
| Joe Pistone | Firefighter Calley | Prison Guard | 3 | 1 |
| Adam William Zastrow | Dewey Moser | Ronald Kepczak | 1 | 1 |
| Alla Korot | Vicky | Linda DeMarco | 1 | 1 |
| Anthony LaVigne | Dax Bixby | Streaking Sailor | 1 | 1 |
| Asanté Deshon | Amir | MPD Rookie Farley | 1 | 1 |
| Assaf Cohen | Ellis | Eli Lissack | 1 | 1 |
| Brad Benedict | Stefan | Navy Lieutenant Nick Rossmore | 1 | 1 |
| Bradley White | Steven | Bart Powell | 1 | 1 |
| Brandon Papo | Jesse, Store Employee | Bobby | 2 | 1 |
| Brian Knoebel | Allen Reid | Scientist | 2 | 1 |
| Brian Oblak | Harbormaster | MPD Cop #1 | 1 | 1 |
| Burt Grinstead | Drew Hudson | Navy Lieutenant Junior Grade William Greco | 2 | 1 |
| Cary Christopher | Hayden Benson | Kaiden Silcott / Al Kaiden | 1 | 1 |
| Cecile Cubiló | René | Cosette | 3 | 1 |
| Crystal Coney | Dr. Friedman | MPD Officer Clara Woods | 1 | 1 |
| DaJuan Johnson | Mike | NIS Special Agent Edward Scott | 1 | 1 |
| Daniel Curtis Lee | Rude Handler, Wade Weaver | SRT #1 | 2 | 1 |
| Ericka Kreutz | Cuffed Woman | Joann Hipple | 1 | 1 |
| Georgia Leva | Bree Darcola | Lisa | 1 | 1 |
| Gilbert Chayrez-Chavarria | Henry Jennings | Male REACT Agent | 1 | 1 |
| Ivar Brogger | Dr. Irving | Simon Katz | 1 | 1 |
| J. Downing | Doctor | Avis Boyle | 1 | 1 |
| Jason Brooks | Jonathan Prescott | Marine Major Danny O'Donnell | 1 | 1 |
| Jaxy Boyd | Brenda | Michelle | 1 | 1 |
| Joe Alvarez | Tommy Shaw | Fire Lieutenant Earl Davis | 1 | 1 |
| Joe Williamson | Alex | Navy Seaman George Capetanos | 1 | 1 |
| John Cothran, Jr. | Ernest | Alfred Holbrook | 1 | 1 |
| John Eddins | Charlie Yates | Steve | 1 | 1 |
| John T. Woods | Lead Agent | Navy Chief Petty Officer Jason Crosby | 1 | 1 |
| Joseph Kamal | Samir Darzi | Captain Kassib Yosef | 1 | 1 |
| Lucas Kerr | Brent | Holden Baxter | 1 | 1 |
| Lyn Alicia Henderson | Social Worker | ER Nurse | 1 | 1 |
| Mathew Yanagiya | Connor | Resident Ryan Cross | 1 | 1 |
| Matt Battaglia | Van Cleef | P.O. Porcaro | 1 | 1 |
| Meryl Hathaway | Jackie | Nora Ankrom | 1 | 1 |
| Nikko Austen Smith | Rachel | Petty Officer Amanda Grayson | 1 | 1 |
| Pat Asanti | Murray | Ruben Williams | 1 | 1 |
| Ramón de Ocampo | Wyatt Hawkerson | Navy Lieutenant Thomas Gorman | 1 | 1 |
| Rich Hutchman | Joe | Deputy Andrews | 1 | 1 |
| Rya Kihlstedt | LAFD Chief Walker | Linda Idleton | 1 | 1 |
| Sarah Utterback | Martha | Elaina Marcus | 1 | 1 |
| Shane Conrad | Kenneth Malone | Navy Lt. Dean Westfall | 1 | 1 |
| Shaw Jones | Minnesota Priest | Navy Commander George Campbell | 1 | 1 |
| Teri Reeves | Bethanne | Navy LTJB Dana Robbins | 1 | 1 |
| Tijuana Ricks | Kristi | CIA Agent Pamela Walsh | 1 | 1 |
| Tom Virtue | Tire Store Employee | Frank Satner | 1 | 1 |
| Tom Wright | Buck's Doctor | Warden Sam Kelleher | 1 | 1 |
| Treisa Gary | Nurse Beverly | Hannah | 1 | 1 |
| A.J. Castro | Special Agent Mark Santos | Seal Team Leader | 1 | 1 |
| Alex J. Joseph | Ledbetter | Navy Sailor Wicks | 1 | 1 |
| Alex Solowitz | Barry Johnson | Dave | 1 | 1 |
| Ann Hu | Joanie | Heather White | 1 | 1 |
| Annie O'Donnell | Faye | Agnes Anderstout | 1 | 1 |
| Benmio McCrea | Doctor | Lawyer | 1 | 1 |
| Blake Lindsley | Kathy | Belinda Carter | 1 | 1 |
| Brendan Bradley | Austin Miller | Male Guest | 1 | 1 |
| Brian Ibsen | Jay | Bryce Tolson | 1 | 1 |
| Brian Maillard | Bill | Leo Finch | 1 | 1 |
| Brianna Reed | Teen Joanne | Libby | 1 | 1 |
| Carlos Sanz | Det. Anderson | Gonzales | 1 | 1 |
| Charley Rowan McCain | Clara | Heidi Umarov Paulsen | 1 | 1 |
| Ck Bolado | Isaiah | Ray | 1 | 1 |
| Cyd Strittmatter | Mallory | Joanne Wright | 1 | 1 |
| Danny Brown | Frida | Sophie | 1 | 1 |
| Delon de Metz | Recruit Novak | Petty Officer Thomas Billings | 1 | 1 |
| Derek Chariton | Crazed White Male | Lonny | 1 | 1 |
| Dylan Kenin | Harley | Freddie Fountain | 1 | 1 |
| Franco Barberis | SWAT Leader | Marine Gunnery Sergeant Matt Lecroix | 1 | 1 |
| Greg Bryan | Watch Commander | Donald Burke | 1 | 1 |
| Helen Day | Drunk Woman | Claire Gaines | 1 | 1 |
| J.D. Walsh | Officer Gerrard | Leonard Finnik | 1 | 1 |
| Jarrod Crawford | Dr. Hoffmann | Marine M.P. Sgt. Brooks | 1 | 1 |
| John O'Brien | Rod Billings | Bruce | 1 | 1 |
| Jonathan Ohye | Dr. Lin | Nigel Yang | 1 | 1 |
| Kimberly Christian | Juanita | Nina Bradshaw | 1 | 1 |
| Mandy June Turpin | Doris Claypool | Karen Bright | 1 | 1 |
| Matt Jayson | LAFD Liaison Bill Jenkins | Edgar Stump | 1 | 1 |
| Matty Castano | Call Center Officer | Eric | 1 | 1 |
| Michael Dempsey | Officer Dowers | Coach Morgan | 1 | 1 |
| Nikki Crawford | Leticia Barry | Dr. Shawna Street | 1 | 1 |
| Robert Curtis Brown | Ronald | Gary Tolin | 1 | 1 |
| Ronald Auguste | Seth | Isaac | 1 | 1 |
| Steven M. Gagnon | Percy | CIA Director Roger Kirkwood | 1 | 1 |
| Tristan Cunningham | Receptionist | Nurse Janeway | 1 | 1 |
| Tyler Francavilla | Bill Parsons | Dustin Vanderschmitt | 1 | 1 |
| Wendy Davis | Judge Howe | Navy Captain Kensington Bloom | 1 | 1 |
| Ryan McCann | Joel | Former 1st Lieutenant John Mayne | 2 | 1 |
| Will Finley | Nathan | Adam Neil | 2 | 1 |
| Alyvia Alyn Lind | Lily Coughlin | Emma Daly | 1 | 1 |
| Andy Umberger | Deputy Chief Phil Evans | FBI Agent Freedman | 1 | 1 |
| Brea Bee | Becca | Mrs. Richter | 1 | 1 |
| Chad Addison | Adam | Young Eric Jurel | 1 | 1 |
| Christian Barber | ND Firefighter | Marine Staff Sergeant Chet Zimmerman | 1 | 1 |
| Christopher Gartin | Nick Durso | Jason Tupperman | 1 | 1 |
| Darren Dupree Washington | Male Firefighter #1 | Security Guard | 1 | 1 |
| Gloria Votsis | Beth Reidman | Dana | 1 | 1 |
| Grace Rowe | Highway Patrol Officer | NCIS Special Agent Donna Andrews | 1 | 1 |
| Greta Sesheta | Marcia Jones | Receptionist | 1 | 1 |
| Jason Woods | Billy | Marine First Lieutenant Rick Romero | 1 | 1 |
| Jeff Harlan | Doctor | Reverend Miller | 1 | 1 |
| Jim Lau | Edward | Old Vendor | 2 | 1 |
| Jodi Harris | Siena | Catherine Taft | 1 | 1 |
| Jon Curry | Frederick Vaughn | Deputy Tyler Barrett | 1 | 1 |
| Laith Wallschleger | Paramedic #1 | Erik Nilsson | 1 | 1 |
| Lisa Cirincione | Mrs. Walters | Kate Manning | 1 | 1 |
| Mike Kersey | Cliff Naglack | Janitor Harry Cooper | 1 | 1 |
| Mike Schiff | Kirk | Navy Reservist John Murphy | 1 | 1 |
| Nigel Gibbs | Dave | Admiral Theodore Tully | 1 | 1 |
| Patrick Robert Smith | Gabe | Tim Gerber | 1 | 1 |
| Penny Peyser | Older Woman | Judge Susan Delphy | 1 | 1 |
| Presciliana Esparolini | Dianne | Virginia State Trooper Johnson | 1 | 1 |
| Rob Brownstein | Dr. Burman | Wayne Gordon | 1 | 1 |
| Sandra Thigpen | Cynthia | Nurse Annie Hayes | 1 | 1 |
| Scott Menville | Ray | Army Sergeant Donald "Donny" Pretorius | 1 | 1 |
| Shannon McClung | Leonard Finked | Boltcutter | 1 | 1 |
| Sterling Sulieman | Jonas | NCIS Special Agent Emil Mineoux | 1 | 1 |
| Terry Woodberry | Dt. Lonnie Wash | Bates | 1 | 1 |
| Time Winters | Professor Russell Sharpe | Scholarly Man #2 | 1 | 1 |
| Vanessa Martinez | Alana Perez | Marta De Leon | 1 | 1 |
| Vincent Duvall | Hugh | Officer Holt | 1 | 1 |
| Warren Sweeney | Ira | Priest | 1 | 1 |
| Wilmer Calderon | Benjamin Cowan | Wayne Cribbage A.K.A. Tiger Dad | 1 | 1 |
| Andy Hoff | Bartender | Jennings' Co-Worker | 1 | 1 |
| Annie Tedesco | Emma Coughlin | Navy Doctor Lieutenant Liz Cortland | 1 | 1 |
| Capri-Antoine Vaillancourt | Manolo | Navy Sailor Myers | 1 | 1 |
| Ethan Corn | 2nd AD Mark | Physician | 1 | 1 |
| Joey Stromberg | Waiter | Marine Corporal Gig Girard | 1 | 1 |
| Joshua Dov | Ted | Portland Douglas | 1 | 1 |
| Kallee Brookes | Baby Bear | Gwen | 1 | 1 |
| Kristen O'Meara | Kathy | Lydia Smith | 1 | 1 |
| Kurt Scholler | City Official | Steve Mehlman | 1 | 1 |
| Mario Ardila Jr. | Mario | Shayne Garcon | 1 | 1 |
| Maryfrances Careccia | Betty | Bailiff | 1 | 1 |
| Maury Morgan | Ivy | Virginia State Police Officer Marsha Jones | 1 | 1 |
| Roopashree Jeevaji | Dr. Gendy | Doctor | 1 | 1 |
| Rueben Grundy | Booking Officer | Philadelphia P.D. Detective Dubrow | 1 | 1 |
| Tammi Mac | Alice | Janice | 1 | 1 |
| Tom Costello | Rick Evans | Nathan Roberts | 1 | 1 |
| Calida Jones | Gen-Z Girl | Resident Alicia Tankersley | 1 | 1 |
| Chaunsi Heatley | Dennis Jenkins' Teen Son | Sailor #1 | 1 | 1 |
| Emanuel Borria | Hugo Castillo | Ricardo | 1 | 1 |
| Jessica Jade Andres | Alyssa | Rachel | 1 | 1 |
| Josh Latzer | Garbage Man #2 | Olek Lazarenko A.K.A. Man | 1 | 1 |
| Lauran September | Erica | Emma Thatcher | 1 | 1 |
| Mann Alfonso | Bouncer | Edgar Fitz | 1 | 1 |
| Pablo Espinosa | Fire Captain Martinez | Arena Security Guard | 1 | 1 |
| S. Zylan Brooks | Hospital Staffer | Catherine Scott | 1 | 1 |
| Sandra Cevallos | Judge Priya Atkins | Judge Monic Perez | 1 | 1 |
| Sean Samuels | SWAT Sniper | Buyer #1 | 1 | 1 |
| Tim Fox | Alec | Navy Petty Officer Second Class Toby Withers | 1 | 1 |
| Tristen MacDonald | Joy Benson | Nurse Davies | 1 | 1 |
| David Paladino | Instructor #1 | Retired Navy Senior Chief P.O. Diego De La Rosa | 1 | 1 |
| Emil Beheshti | Male Administrator | FBI Agent Dan Lenroff | 1 | 1 |
| Ethan Flower | Uniformed Cop | Fire Chief Alfonso Romero | 1 | 1 |
| Jamie Renee Smith | Penny | Rhiannon | 1 | 1 |
| Jamison Jones | Oren | Gelfand | 1 | 1 |
| Tom Billett | Dallas | Viggo Trellis | 1 | 1 |
| Andy Cohen | Jerome | Doctor Warren Cole | 1 | 1 |
| Julien Ari | Front Desk Clerk | Walt Fergus | 1 | 1 |
| Wiley Pickett | Captain Cooks | Navy Captain David Wade | 1 | 1 |
| James Babson | Ralph | Mickey Clark | 1 | 1 |
| John Gloria | LAPD Negotiator | George Kaydar | 1 | 1 |
| Monti Sharp | Suit Salesman | Handler | 1 | 1 |
| Jonathan Salisbury | Middle Aged Man | Stephenson | 1 | 1 |
| Patrick Quinlan | Steven | London Bobby | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.