All 161 actors in both ER and S.W.A.T.
161 actors have appeared in both ER and S.W.A.T., across 494 episodes. The most-credited is Lyn Alicia Henderson, Paramedic Pamela Olbes in ER and Drea in S.W.A.T..
| Actor | In ER | In S.W.A.T. | Eps | Eps |
|---|---|---|---|---|
| Lyn Alicia Henderson | Paramedic Pamela Olbes | Drea | 149 | 1 |
| Michael Beach | Al Boulet | Leroy Henderson | 19 | 14 |
| Rochelle Aytes | Tamara | Nichelle Carmichael | 1 | 20 |
| Patrick St. Esprit | Mr. Thorpe | Commander Robert Hicks | 1 | 16 |
| Louis Ferreira | Michael Mueller | William "Buck" Spivey | 1 | 9 |
| David Gautreaux | Scruffy | Edward Yannick, PBA Lawyer Younce | 1 | 7 |
| Peter Onorati | Officer Nick Napolitano | Jeff Mumford | 1 | 6 |
| Amy Farrington | Sandy Mader | Lieutenant Piper Lynch | 1 | 5 |
| Malaya Rivera Drew | Katie Alvaro | Trisha Hayes | 11 | 1 |
| Merrin Dungey | Daphina | Deputy Chief Bennett | 1 | 5 |
| Emerson Brooks | Gonzalez | Deputy Alex Doberstein | 1 | 4 |
| Stacey Travis | Detective Weller | Nikki | 2 | 3 |
| Sumalee Montano | Duvata Mahal | Gwen Miller | 10 | 3 |
| Cory Hardrict | Curtis, Lil 'Toine | Nate Warren | 2 | 4 |
| Rif Hutton | Mr. Royston | Ernie Gamble | 1 | 2 |
| April Parker Jones | Joyce | Winnie Harrelson | 1 | 4 |
| Lombardo Boyar | Morris Campbell | Detective Rios | 1 | 4 |
| Michael O'Neill | Col. Ken Kilner | Carl Luca | 1 | 4 |
| Michael B. Silver | Dr. Paul Myers | Vince Jones | 12 | 1 |
| Terri Hoyos | Mrs. Corvalan | Mama Pina | 1 | 3 |
| Carl Lumbly | Dr. Graham Baker | Hank "Saint" St. John | 2 | 3 |
| Nicki Micheaux | Mrs. Williams | Leah Jankins | 1 | 4 |
| Marisol Ramirez | Mrs. Escalante | Denise Shaw | 1 | 2 |
| Sterling Beaumon | Danny Raskin | J.P. Hicks | 1 | 2 |
| Dahlia Salem | Dr. Jessica Albright | Agent Rafa Bashir | 7 | 1 |
| Kareem Grimes | B.G. | Little Red | 1 | 4 |
| Shi Ne Nielson | Med Student Sheila | Officer Gretchen Willis | 4 | 1 |
| Arlen Escarpeta | Adrian | Devlin | 1 | 2 |
| Monnae Michaell | Mrs. Bell | Loretta Carmichael | 1 | 2 |
| Silas Weir Mitchell | Luis, Marcus Hainey | Phil Winter | 2 | 1 |
| Tim Griffin | Captain John Evans | Adam Max | 2 | 1 |
| Trevor Morgan | Scott Anspaugh | Prison Guard Marks | 5 | 1 |
| Christopher Goodman | Andrew | Theo | 1 | 1 |
| J. Anthony Pena | Tackle | Sergio Diaz | 1 | 1 |
| John Marshall Jones | Mr. Gaither | Detective Sal Marcus | 1 | 1 |
| Michael McGrady | Fire Captain Davis | ATF Agent Ray Kaminski | 1 | 1 |
| Scott Lawrence | Children's Services Rep | Kyle Johnson | 1 | 1 |
| Nigel Gibbs | Matson | Judge Shelton | 1 | 2 |
| Colby French | Greg Becton | Sam Garrett | 1 | 1 |
| Dan Martin | Lieutenant | Dell | 1 | 1 |
| Dendrie Taylor | Mrs. Knoll | Frida | 1 | 1 |
| Eddie Shin | Med Student Stanley Mao | Officer David Wong | 2 | 1 |
| Freda Foh Shen | Audiologist | Dean Hargrove | 3 | 1 |
| Jason Wiles | Officer Maurice "Bosco" Boscorelli | Sgt. Vandelli | 1 | 1 |
| Larry Sullivan | Martin Pryor | Robert Miller | 1 | 1 |
| Nancy Linehan Charles | Glenda Walton | Martha Ramos | 1 | 1 |
| Rebecca Field | Psych Woman | Annabeth | 1 | 1 |
| Rebecca Tilney | Judy Cochran | Pam | 1 | 1 |
| Rick Cramer | McCormick, Officer O'Bannon | Deputy Chief Braun | 2 | 1 |
| Rob Evors | Gary | Ty Olson | 1 | 1 |
| Veena Bidasha | Asha, Belly Dancer #1 | Dr. Cunningham | 2 | 2 |
| David Joyner | Dialysis Tech | Leon | 3 | 1 |
| Juanita Jennings | ICU Doctor, Mrs. Davis | Faith | 2 | 1 |
| Terry Maratos | Garvey | Hines | 2 | 1 |
| Kathe Mazur | Kate Nelson | Dr. Michaels | 1 | 1 |
| Katrina Begin | Ginger | Devon Bailey | 1 | 1 |
| Larry Herron | Mitch Kellems | Jerod Whitlock | 1 | 1 |
| Lily Knight | Mary Cochran | Mary Beth | 1 | 1 |
| Lobo Sebastian | Freddy Harrison | Cuchillo | 1 | 1 |
| Shane Johnson | Jason | Special Agent Alan Ritter | 1 | 1 |
| Andy Umberger | Dr. David Harvey | Judge Martin Walker | 2 | 1 |
| Amy Benedict | Mom | Gail Morgan | 1 | 1 |
| Audrey Wasilewski | Officer Wetterling | Armored Car Driver | 1 | 1 |
| Cooper Huckabee | Hayes | A.O.D. | 1 | 1 |
| Eileen Grubba | TV Reporter | Pam Hawks | 1 | 1 |
| Geoff Meed | Bart, Gary Parnell | Julian Matthews | 2 | 1 |
| Gloria Garayua | Gloria Ortiz | Sofia | 1 | 1 |
| Isabella Hofmann | AIDS Clinic Doctor | Marian Evans | 1 | 1 |
| Jeff Corbett | Mike Dodds | Sheriff Doyle | 1 | 1 |
| Jonathan T. Floyd | Student | Hollister | 1 | 1 |
| Kari Coleman | Mona | Rebecca Cates | 1 | 1 |
| Kathleen Gati | Stacy Coleman | Zora | 1 | 1 |
| Mandy June Turpin | Viv Rafferty | FBI Agent Eileen Conley | 1 | 1 |
| Matthew Jones | Cop | Sergeant Samuel Clark | 1 | 1 |
| Meera Simhan | Mandy | Arjet Reddy | 1 | 1 |
| Michael Reilly Burke | Dick White | CIA Agent Devereaux | 1 | 1 |
| Sean Blakemore | Mario | Elijah Leonard | 1 | 1 |
| Thomas Rosales, Jr. | Orderly Enriquez | Attendant | 2 | 1 |
| Tim De Zarn | Mr. Krawczyk | Brewster | 2 | 1 |
| Will Rothhaar | Robert "Bo" Borsalino | Pete Moore | 1 | 1 |
| Adam Chambers | Chapman | Corbett Hargrave | 1 | 1 |
| David Bowe | Father of Unicycle Boy | Walter Bolton | 1 | 1 |
| Joe Camareno | Manuel | Dr. D. Mendoza | 1 | 1 |
| Jose Pablo Cantillo | Juan Enriquez | Ricardo Fuentes | 1 | 1 |
| Judith Moreland | Nurse Terry | Tallulah | 1 | 1 |
| Kelli Dawn Hancock | Tina Kirk | Deputy Ross | 1 | 1 |
| Kevin Jackson | Harold Percy | Dorsey | 1 | 1 |
| Liz Burnette | Dr. Maya Tenison | Martinez | 1 | 1 |
| Marlon Young | Paramedic Thomas | Curtis | 1 | 1 |
| Scott Menville | Beidermeier | Aggro Prisoner | 1 | 1 |
| Shelley Robertson | Tanya Phillips | Standards Bureau Rep. Carrasco | 1 | 1 |
| Stacy Haiduk | Impaled Mom | Diane | 1 | 1 |
| Tom Virtue | Pares | Surgeon | 1 | 1 |
| Zoran Radanovich | Niko Kovač | Petavich | 3 | 1 |
| Andrew James Allen | Casey | Billy | 1 | 1 |
| Darion Basco | Justin Chang | Javier | 1 | 1 |
| Eve Gordon | Mrs. Nugent | Jenny | 1 | 1 |
| Evelina Martinez | Sedgewick | Frightened Woman | 1 | 1 |
| Jake Thomas | Nick Riley | Bayo | 1 | 1 |
| Jon Curry | Karl | George Becket | 1 | 1 |
| Joseph Raymond Lucero | Freddie | Mizael "El Tuzo" Martinez | 1 | 1 |
| Judy Jean Berns | Mrs. Fredriksson | Eloise Evans | 1 | 1 |
| Karl T. Wright | Dr. Norris | Declan | 1 | 1 |
| Kurt Caceres | Luis Sanchez | Jam "Bricklayer" Gomez | 1 | 1 |
| Mercedes Colon | Detective | Sister Carmelita | 1 | 1 |
| Ren Hanami | NICU Nurse | Dr. Sari Fields | 2 | 1 |
| Cal Gibson | Kim Tadlock | Mickey | 1 | 1 |
| J.R. Cacia | Ogilvie | Bosowski | 1 | 1 |
| Kimleigh Smith | Ringwood | Paula | 1 | 1 |
| Lorin McCraley | Gillie | Disco | 1 | 1 |
| Rigo Sanchez | Vega | Diego | 1 | 1 |
| Stacey Hinnen | Bolog | Oliver Davis | 1 | 1 |
| Tom Schanley | Detective Middleton | Captain Barnett | 1 | 1 |
| Veralyn Jones | Agent Vickery, Mrs. Powell | Angry Woman | 2 | 1 |
| Brynn Horrocks | Mary Casey | Wilma | 1 | 1 |
| Eileen Barnett | Dr. Robbins | Patricia Clark | 1 | 1 |
| Mike Randleman | Cop - 1 | Clem | 1 | 1 |
| Rocky McMurray | Sergeant Myers | Captain | 1 | 1 |
| Shirley Jordan | IDC Analyst | Rebecca Grayson | 1 | 1 |
| Susan Angelo | Mrs. Frum | Lila Kay | 1 | 1 |
| Vincent Duvall | Father | Dewitt | 1 | 1 |
| Ajgie Kirkland | Monty | Oz | 1 | 1 |
| Dustin Cyril Robles | Kevin | Porn Prisoner | 1 | 1 |
| Joshua Dov | Matt | Arnold Boseman | 1 | 1 |
| Ken Meseroll | Mr. Sawyer | Mike | 1 | 1 |
| Lynette DuPree | Athena | Ms. Hattie | 1 | 1 |
| Monica Garcia | Benita Escobar | D.C. Rickert | 1 | 1 |
| Ricco Ross | Barnard | Coach Harley | 1 | 1 |
| Robert Cicchini | Channel 5 Chopper Reporter | Mark | 1 | 1 |
| Serene Branson | Karyn | News Anchor | 1 | 1 |
| Charles Hittinger | Michael Leary | Rookie Officer Tanner | 1 | 1 |
| Gilbert Glenn Brown | Lou Smith | William | 1 | 1 |
| Kevin Sifuentes | MacGee | Henry | 1 | 1 |
| Steven M. Gagnon | Dr. Blum | Warden Phil Harvey | 1 | 1 |
| William Charlton | Man | Foreperson | 1 | 1 |
| Angela Landis | Kathy | Secretary | 1 | 1 |
| J. Rene Pena | Mrs. Mode | Governor | 1 | 1 |
| Molly Baker | Mary Marchak | Bus Driver | 1 | 1 |
| Terrell Lee | Russomante | Rudi | 1 | 1 |
| Terrence Hardy, Jr. | Lucas Kirk | Anthony | 1 | 1 |
| Yorgo Constantine | Trekkie | Pavlo Koslov | 1 | 1 |
| Anoush NeVart | Sarshad | Tourist Woman | 1 | 1 |
| Jacqueline Hahn | Dr. Bazzano | Sister Irene | 1 | 1 |
| Carrie Armstrong | Instructor | Sunny | 1 | 1 |
| Charles Emmett | Derezin | Councilman Sumner Washington | 1 | 1 |
| Doreene Hamilton | ICU Nurse | Idil | 1 | 1 |
| Ethan Flower | Brit #2 | Allen Finley | 1 | 1 |
| James C. Victor | Patrick | Galvin | 1 | 1 |
| Jordana Capra | OB Attending | Security Chief | 1 | 1 |
| Aaron Braxton | Detective Miles | Katrell Porter | 1 | 1 |
| Cici Lau | Mrs. An | Mina | 1 | 1 |
| Pablo Espinosa | Driver John | Sheriff Perry | 1 | 1 |
| Ambrit Millhouse | Mother | Attendant | 1 | 1 |
| David Douglas | Miller | Will | 1 | 1 |
| Earnestine Phillips | Nancy | Iris | 1 | 1 |
| Pamela Shaddock | Reporter Winslow | Detective Fraley | 1 | 1 |
| Jacory Gums | James Silcott | Leonard | 1 | 1 |
| Sven Holmberg | Lars | Ivan | 1 | 1 |
| Betty Murphy | Nancy | Mrs. Perkins | 1 | 1 |
| John Barbolla | Keith | LAFD Captain | 1 | 1 |
| Bunnie Rivera | Maria | Rosario | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.