All 137 actors in both ER and Shark
137 actors have appeared in both ER and Shark, across 369 episodes. The most-credited is Leland Orser, Dr. Lucien Dubenko in ER and Brent Gilroy in Shark.
| Actor | In ER | In Shark | Eps | Eps |
|---|---|---|---|---|
| Leland Orser | Dr. Lucien Dubenko | Brent Gilroy | 61 | 1 |
| Michael Beach | Al Boulet | Lester Spence | 19 | 1 |
| Carlos Gómez | Paramedic Raul Melendez | Mayor Manuel Delgado | 6 | 12 |
| Mädchen Amick | Wendall Meade | Gina Romero | 10 | 1 |
| Michelle C. Bonilla | Paramedic Christine Harms | Elena Perez | 58 | 1 |
| Michael B. Silver | Dr. Paul Myers | Dan Lauter | 12 | 4 |
| Shaun Sipos | Nick | Trevor Boyd | 1 | 7 |
| Amy Aquino | Dr. Janet Coburn | Judge Kelly Grant | 26 | 1 |
| Ivar Brogger | Deposition Attorney | Judge Kenneth Woodruff | 1 | 4 |
| Jami Gertz | Dr. Nina Pomerantz | Sara Metcalfe | 6 | 1 |
| Joan McMurtrey | Birdwatcher | Carla Sussman | 1 | 2 |
| Shashawnee Hall | Detective Ford | Judge Thomas Watkins | 2 | 3 |
| David Barrera | Felix Hernandez | M.E. Mickey Cruz-Alvarez | 1 | 3 |
| John Cothran, Jr. | Dennis Gant, Sr. | Judge Perry Webb | 1 | 3 |
| Kari Matchett | Dr. Skye Wexler | Monica Tanner | 5 | 1 |
| Charlayne Woodard | Angela Gilliam | Professor Emily Chambers | 7 | 1 |
| Efrain Figueroa | Julio Echevarria | Judge Victor Ortiz | 1 | 2 |
| Željko Ivanek | Bruce Resnick | Elliott Dasher | 1 | 2 |
| Sumalee Montano | Duvata Mahal | Arlene Pierce | 10 | 1 |
| Denise Dowse | Mrs. Lysell | Judge Jane Briar | 1 | 3 |
| George Wyner | Rabbi | Judge George Morton | 2 | 2 |
| Julian Morris | Dr. Andrew Wade | Dylan Crawford | 7 | 1 |
| Dennis Boutsikaris | Dr. David Kotlowitz | D.A. Lester Rivers | 4 | 1 |
| Michelle Hurd | Courtney Brown | Dr. Connie Vasquez | 6 | 1 |
| Scott Michael Campbell | EMT Reilly Brown | Tommy Callison | 7 | 1 |
| Bruce Nozick | Craig Simon | Kevin Gage | 2 | 2 |
| Clyde Kusatsu | Review Board Doctor #1 | Judge Chudacoff | 1 | 1 |
| John Kapelos | Mr. Irby | Presiding Officer | 1 | 2 |
| Jonathan Banks | Robert Truman | Jason Normandy | 1 | 2 |
| Lynda Boyd | Deborah Harris | Maya Snider | 1 | 1 |
| Michael Cavanaugh | Suzanne's Dad | Judge Newman | 1 | 2 |
| Jacqueline Hahn | Dr. Bazzano | Judge Kathryn Cavanaugh | 1 | 2 |
| Jeffrey D. Sams | Dr. Dorsey Watson | Julian Cook | 1 | 2 |
| Raphael Sbarge | Mr. Kirkendall | Christopher Hoffs | 2 | 1 |
| John Rubinstein | Dr. Kenner | Lance Horning | 1 | 1 |
| Miles Heizer | Joshua Lipnicki | Jackie Buckner | 4 | 1 |
| Alison Martin | Mrs. Kendrick | Judge Rita Bardos | 1 | 2 |
| Vernée Watson | April Wilson | Judge Miriam Keller | 2 | 1 |
| Christopher Cousins | Kyle Kolber | Richard Metcalfe | 1 | 1 |
| Eric Ladin | Pvt. Thomas Perry | Ronald Harper | 1 | 1 |
| Jason George | Ethan Mackiner | Ray Harkin | 2 | 1 |
| Kent Shocknek | Newsreporter | Reporter | 1 | 3 |
| Monique Gabriela Curnen | Nurse Blanca | Claudia Reyes | 1 | 1 |
| Zachery Ty Bryan | Upsilon Psi Lambda Frat Brother | Scott Natterson | 1 | 1 |
| François Chau | Neuro Resident | Mike Wong | 2 | 1 |
| Tom Wright | Wharton | Deputy Police Chief George Martinson | 2 | 1 |
| Colby French | Greg Becton | Carl Wilson | 1 | 1 |
| Rochelle Aytes | Tamara | Karla Ballantine | 1 | 1 |
| Thomas Dekker | 4 Year Old Boy | Ben Channing | 1 | 1 |
| Andy Umberger | Dr. David Harvey | Dr. Bennett Flynn | 2 | 1 |
| Michael Adler | Marty, Rick | Dr. Dan Millman | 2 | 1 |
| Patricia Lentz | Nursing Supervisor | Family Court Judge | 2 | 1 |
| Brady Smith | Rod | Carl Lisco | 1 | 1 |
| Christopher Allport | Mr. Strickland | Larry Davis | 1 | 1 |
| Dale Dickey | Mrs. Price | Nancy Padget | 1 | 1 |
| Glenn Morshower | Rick Decoyte | LAFD Deputy Chief Don Alston | 1 | 1 |
| Judith Scott | Mandy Smith | Dr. Laura Fields | 1 | 1 |
| Kevin Durand | Mr. Mooney | Rick Carris | 1 | 1 |
| Laurie O'Brien | Mrs. Richards | Amanda Morton | 1 | 1 |
| Patrick Kilpatrick | Matthew Lindermulder | Paul Masters | 1 | 1 |
| Suzanne Cryer | Toni Stillman | Andrea Crosby | 1 | 1 |
| Tom Virtue | Pares | Larry Reiner | 1 | 1 |
| Jon Sklaroff | Bible Guy, Eddie Hainey | Deno Orr | 2 | 1 |
| Albie Selznick | Mr. Lanford | Warren Dowd | 1 | 1 |
| Cullen Douglas | Marvin | Peter Mirsky | 1 | 1 |
| Eugene Byrd | James Connor | Kurt Bellows | 1 | 1 |
| Gina Gallego | Instructor | Victoria Reyes | 1 | 1 |
| Lisa Kaminir | Jessie | Yvonne Sterling | 1 | 1 |
| Nestor Serrano | David Torres, CDC | Duke Ballantine | 1 | 1 |
| Rodney Eastman | Freddie Robinson | Charlie Davis | 1 | 1 |
| Troy Ruptash | Dave Fern | Mike Brigham | 1 | 1 |
| Carla Jimenez | Eloise | Jury Foreperson | 2 | 1 |
| Anjul Nigam | Ghandar | Alex Neuville | 1 | 1 |
| Christopher B. Duncan | Matthew Graham | Rick Lucas | 1 | 1 |
| Christopher DerGregorian | Officer Munoz | Deputy | 1 | 1 |
| Deidrie Henry | Nichelle Richardson | Detective Garland | 1 | 1 |
| Kathleen Garrett | Mrs. Meeker | Judge Mary Osman | 1 | 1 |
| Laura Leigh Hughes | Mrs. Milner | Natalie Warner | 1 | 1 |
| Michael Dempsey | Mr. Beckwith | Impound Lot Attendant | 1 | 1 |
| Michael Hyatt | Yvonne Devilliere | Ruth Hartford | 1 | 1 |
| Michael Mantell | Mr. Spencer | Norman Elby | 1 | 1 |
| Mo Gallini | Guy | Theo Samaha | 1 | 1 |
| Patty McCormack | Mrs. Dwyer | Mary Belkin | 1 | 1 |
| Rusty Schwimmer | Grollman | Wendy Dunmiller | 1 | 1 |
| Sonny Marinelli | Sgt. Deturno | Detective Richie Swift | 1 | 1 |
| Brian Chenoweth | Radiology Tech | Neighbor | 2 | 1 |
| K.T. Thangavelu | Dr. Subramanian | O.R. Nurse | 2 | 1 |
| Dex Elliott Sanders | Deon | Greg Tobias | 1 | 1 |
| Mark Rolston | Officer Thomas | Cade Berlinger | 1 | 1 |
| Sam Witwer | Tommy | Richard Lee Franco | 1 | 1 |
| Scott Paulin | Dr. Kirsch | Craig Deering | 1 | 1 |
| Sterling K. Brown | Bob Harris | Quenton North | 1 | 1 |
| Eli Goodman | NICU Resident | Michael Green | 2 | 1 |
| Alla Korot | Mrs. Dupont | Tracy Weston | 1 | 1 |
| Brett Rickaby | Vincent Hales | Hank Gibbons | 1 | 1 |
| David Noroña | MRI Tech | Tony Gorham | 1 | 1 |
| Emilio Rivera | Emilio Cardazco | Detective #1 | 1 | 1 |
| Jamison Yang | Shuang Tseng | Forensics | 1 | 1 |
| Joseph Castanon | Reggie Santo | Ethan Sterling | 1 | 1 |
| Lou George | Driver | Wilson Stevens | 1 | 1 |
| Michael Raynor | Joseph Morgan | Joe Bertelsen | 1 | 1 |
| Michael Reilly Burke | Dick White | Stuart Buckner | 1 | 1 |
| Nike Doukas | Mrs. O'Connor | Carla Jarret | 1 | 1 |
| Robert Cicchini | Channel 5 Chopper Reporter | Ramon Campos | 1 | 1 |
| Jeremy Shada | Bobby | CJ Chambers | 1 | 1 |
| Ken Meseroll | Mr. Sawyer | Arnold Weston | 1 | 1 |
| Kim Evey | Hung | Kate Prestin | 1 | 1 |
| Paul Norwood | Lee Rafferty | M.E. Russell Barry | 1 | 1 |
| Ramy Zada | Vincent Greco | Andy Zahai | 1 | 1 |
| Adam Lieberman | Levine | Detective | 1 | 1 |
| Federico Dordei | Aldo | Emilio Perez | 1 | 1 |
| Jack Weber | Paulie | Kid | 1 | 1 |
| Jamie Renee Smith | Emily Perrault | Abby Coleman | 1 | 1 |
| Jeremy Luke | Thomas Grasso | Phone Guy | 1 | 1 |
| Jim Jansen | Neonatologist | Judge | 1 | 1 |
| John Lacy | Kevin Poole | Terry Burns | 1 | 1 |
| Andrew James Allen | Casey | James Weyland | 1 | 1 |
| Geoffrey Rivas | Haven | Detective Roja | 1 | 1 |
| Jerry Zatarain Jr. | Manny Salazar | Luis | 1 | 1 |
| Baadja-Lyne Odums | Driver | Older Woman | 1 | 1 |
| Carlos Alvarado | Gang Member | Reuben Gutierrez | 1 | 1 |
| Gilbert Glenn Brown | Lou Smith | Detective | 1 | 1 |
| Jos Viramontes | Paul | Professor Anthony Ramirez | 1 | 1 |
| Kerrie Keane | Melissa Walker | Barbara Seligman | 1 | 1 |
| Shirley Jordan | IDC Analyst | Judge Vivian Bell | 1 | 1 |
| Christian Svensson | Sheriff Pohler | Detective | 1 | 1 |
| Colleen McGrann | Zwerling | Carol Faber | 1 | 1 |
| Jim Klock | Tech | Sid | 1 | 1 |
| Kim Estes | Lieutenant Higgins | Bailiff #1 | 1 | 1 |
| Kimble Jemison | Tom | 2nd Juror | 1 | 1 |
| Mark Sivertsen | Dan Ferkich | Marty Babish | 1 | 1 |
| Michael Cavalieri | Mr. Fazio | Tyson Shaw | 1 | 1 |
| Nigel Gibbs | Matson | Deputy Chief Hunter | 1 | 1 |
| Terry Savage | Radiologist Nurse | CSI Tech | 1 | 1 |
| Julie Dixon Jackson | Angry Mom | Suburban Mom | 1 | 1 |
| Kimleigh Smith | Ringwood | Detective | 1 | 1 |
| Paul Webster | Sheriff Radford | Greg Kamins | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.