All 171 actors in both ER and Star Trek: Deep Space Nine
171 actors have appeared in both ER and Star Trek: Deep Space Nine, across 507 episodes. The most-credited is Leland Orser, Dr. Lucien Dubenko in ER and Gai, Lovok in Star Trek: Deep Space Nine.
| Actor | In ER | In Star Trek: Deep Space Nine | Eps | Eps |
|---|---|---|---|---|
| Leland Orser | Dr. Lucien Dubenko | Gai, Lovok | 61 | 2 |
| Max Grodénchik | Street Vendor | Rom, Grand Nagus Gint, Mirror Rom | 1 | 36 |
| Lily Mariye | Nurse Lily Jarvik | Ops Officer | 127 | 2 |
| Penny Johnson Jerald | Nurse Practitioner Lynette Evans | Kasidy Yates, Cassie | 9 | 16 |
| Rosalind Chao | Dr. Theresa Chow | Keiko O'Brien | 1 | 19 |
| Louise Fletcher | Roberta "Birdie" Chadwick | Kai Winn Adami | 3 | 15 |
| Michael B. Silver | Dr. Paul Myers | Vinod | 12 | 1 |
| Casey Biggs | Mike | Damar, Dr. Wykoff | 1 | 24 |
| Chase Masterson | Mrs. Phillips | Leeta, Emony Dax, Mirror Leeta | 1 | 17 |
| Wallace Shawn | Teddy Lempell | Grand Nagus Zek | 1 | 7 |
| Cress Williams | Officer Reggie Moore | Talak'talan | 14 | 1 |
| Camille Saviola | Margaret | Kai Opaka | 1 | 5 |
| Ann Gillespie | Mrs. Ellis | Nurse Jabara | 1 | 4 |
| James Cromwell | Bishop Stewart | Hanok | 4 | 1 |
| Chris Sarandon | Dr. Burke | Martus Mazur | 3 | 1 |
| F.J. Rio | Miguel Rivas | Enrique Muñiz | 1 | 3 |
| Megan Gallagher | Kathy Snyder | Faith Garland, Mareel | 2 | 2 |
| Paul Dooley | Henry Lewis | Enabran Tain | 4 | 4 |
| Gregory Itzin | Burn Doctor | Hain, Ilon Tandro | 1 | 2 |
| Jack Shearer | Hal Grunwald | Ruwon, Vadosia | 1 | 2 |
| James Lashly | Eddie | Lieutenant George Primmin | 1 | 2 |
| Leland Crooke | Bart | Gelnon | 1 | 2 |
| Tim Russ | Dr. Medford | Mirror Tuvok, T'Kar | 1 | 2 |
| Mike Genovese | Officer Al Grabarsky | Captain Zef'No | 12 | 1 |
| Felecia M. Bell | Janna Mikami | Jennifer Sisko, Mirror Jennifer Sisko | 1 | 4 |
| Lawrence Monoson | Dean Rollins | Hovath | 4 | 1 |
| John Doman | Dr. Carl Deraad | Lenaris Holem | 10 | 1 |
| Christopher Michael | Security Officer | Helm Officer | 5 | 1 |
| John Towey | Anatomy Professor | Vedek Ossan | 1 | 1 |
| Joseph Ruskin | Mr. Kingsley | Tumek, Cardassian Informant | 1 | 3 |
| Karen Austin | Mrs. Carlson | Dr. Kalandra | 1 | 1 |
| Meg Foster | Mrs. Hall | Onaya | 1 | 1 |
| Robert Picardo | Abraham Zimble | Dr. Lewis Zimmerman, EMH Mark I | 1 | 1 |
| Tina Lifford | Evelyn Pratt | Lee | 2 | 2 |
| Tom Towles | Teenage Boy's Father | Hon'Tihl | 1 | 1 |
| William Lucking | Kenny Brannigan | Furel | 1 | 3 |
| Bob Minor | Security Guard, Buck, Officer Jenkins | Bo'rak | 4 | 1 |
| Julianna McCarthy | Mrs. Raskin | Mila | 2 | 3 |
| Bruce Wright | George Dunleavy, Pilot Gordon | Sarish Rez | 2 | 1 |
| Ron Taylor | Bob | Klingon Chef | 1 | 2 |
| Thomas Kopache | Dr. Stofsky | Kira Taban | 1 | 2 |
| Christine Healy | Administrator Harriet Spooner | Seltin Rakal | 3 | 1 |
| Deborah May | Nursing Director Mary Cain | Haneek | 7 | 1 |
| Scott MacDonald | Ambulance Driver, Detective | Goran'Agar, Tosk | 2 | 2 |
| Megan Cole | Pathologist Dr. Upton | Kimara Cretak | 7 | 2 |
| Deborah Lacey | Det. Tincreed | Sarah Sisko | 1 | 6 |
| Carlos Carrasco | Dominican Uncle | D'Ghor, Klingon Alliance Officer, Krole | 1 | 3 |
| Danny Goldring | Tony Logan | Burke, Legate Kell | 1 | 2 |
| Deborah Strang | Mrs. Drane | Admiral T'Lara | 1 | 1 |
| Diane Salinger | Sophie's Mom | Lupaza | 1 | 2 |
| Dick Miller | Mr. Ackerman | Vin | 1 | 2 |
| Dylan Haggerty | Coach Yazerski | Epran | 1 | 1 |
| Ernest Perry Jr. | Gus, Server | Admiral Charlie Whatley | 2 | 1 |
| Gail Strickland | Dr. Renee Spielman | Alixus | 1 | 1 |
| Gina Philips | Nurse Kathy | Varis Sul | 1 | 1 |
| Heidi Swedberg | Robin Turner | Rekelen | 2 | 1 |
| Jack Blessing | Roger Drummond | Dulmer | 1 | 1 |
| Jim Jansen | Neonatologist | Faren Kag, Lucsly | 1 | 2 |
| Jimmie F. Skaggs | Joe Chattarowski | Glinn Boheeka | 3 | 1 |
| John Cothran, Jr. | Dennis Gant, Sr. | Telok | 1 | 1 |
| John Eric Bentley | Larry Anderson | Klingon | 1 | 1 |
| Jonathan Banks | Robert Truman | Golin Shel-la | 1 | 1 |
| Kathleen Garrett | Mrs. Meeker | Vulcan Captain | 1 | 1 |
| Lisa Lord | Wu | Nurse | 1 | 1 |
| Matthew Faison | Dr. Weinstein | Surmak Ren | 1 | 1 |
| Maureen Flannigan | Mrs. Gamble | Mika | 1 | 1 |
| Michael J. Harney | Mr. Stehly | Chadwick | 1 | 1 |
| Michael Reilly Burke | Dick White | Hogue | 1 | 1 |
| Molly Hagan | Meredith Smart | Eris | 1 | 1 |
| Robert DoQui | Minister | Noggra | 1 | 1 |
| Tony Plana | Priest | Amaros | 1 | 2 |
| William Schallert | Mitchell Jennings | Varani | 1 | 1 |
| John Prosky | Mr. Brooks | Brathaw | 4 | 1 |
| Gregory Wagrowski | Walton, Herm Bullard | Captain Solok | 3 | 1 |
| Benjamin Brown | Cop, Lab Tech | Kagan | 2 | 1 |
| Brad Greenquist | Mr. Butler | Krit | 2 | 1 |
| Randy Oglesby | PICU Doctor | Ah-Kel, Ro-Kel, Silaran Prin | 1 | 2 |
| Terrence Evans | Barry Mahoney | Baltrim, Proka Migdal | 1 | 2 |
| Anne Haney | Mrs. Packer | Els Renora | 1 | 1 |
| Art Chudabala | Greg | Lieutenant Hector Ilario | 1 | 1 |
| Cyril O'Reilly | Prisoner Mike Kinney | Nashk | 1 | 1 |
| Ellen Wheeler | Beth Lang | Ekoria | 1 | 1 |
| Eric Pierpoint | Mr. Dwyer | Captain Sanders | 1 | 1 |
| Jack Kehler | Jail Officer | Captain Jaheel | 1 | 1 |
| Lawrence Tierney | Jack Johnson | Regent of Palamar | 1 | 1 |
| Michelle Krusiec | Tong-Ye | Adult Molly O'Brien | 1 | 1 |
| Paul Collins | Dr. Norm Middleton | Zlangco | 1 | 1 |
| Sara Mornell | Robin Gambrell | Ensign Carson | 1 | 1 |
| Vaughn Armstrong | Greg Mitchell | Seskal, Gul Danar | 1 | 3 |
| Amanda Carlin | Librarian | Kobb | 1 | 2 |
| Bill Bolender | Hank Riley | The Albino | 2 | 1 |
| Bruce Gray | Carter Board member, Dr. Munch | Admiral Chekote | 2 | 1 |
| Conor O'Farrell | Richard Abbott | Jeff Carlson | 2 | 1 |
| Jeffrey Alan Chandler | Mr. Skapinski | Guardian | 2 | 1 |
| Jesse Littlejohn | Noah Krawczyk | Gabriel | 2 | 1 |
| Shannon Cochran | Mrs. Klingman | Kalita, Sirella | 1 | 2 |
| Steve Vinovich | Wayne Lentloff | Joseph | 2 | 1 |
| Brad Blaisdell | Detective | Yint | 3 | 1 |
| Bertila Damas | Dr. Debra Wexler | Sakonna | 1 | 2 |
| Caroline Lagerfelt | Andrea | Chief Archon Makbar | 1 | 1 |
| Charles Rahi Chun | Ben's Dad | Engineer | 1 | 1 |
| Darwyn Carson | Grieving Woman, Katherine | Romulan Tal Shiar Operative | 2 | 1 |
| Dell Yount | Mazanski | Tilikia | 1 | 1 |
| Gwynyth Walsh | Barbara Knight | B'Etor | 1 | 1 |
| Jacqueline Schultz | Mrs. Blevins | Jessica Sloan | 1 | 1 |
| James Otis | Brixton | Ranjen Solbor | 1 | 3 |
| K Callan | Kelly Robinson | Alsia | 1 | 1 |
| Marjean Holden | Elise Warner | Crewman Stolzoff | 1 | 1 |
| Michael Jace | Bill Nelson | 1st Officer | 2 | 1 |
| Nancy Youngblut | Sarah Howe | Kolana | 1 | 1 |
| Nicholas Cascone | Howard Mills | Timor | 1 | 1 |
| Peggy Roeder | Ruth Huggins | Y'Pora | 1 | 1 |
| Rachel Robinson | Ms. Brown | Melanie | 1 | 1 |
| Randy Mulkey | Captain Exley | Idanian Operative | 1 | 1 |
| Scott Haven | P.K. Palmer IV | Virak'kara | 1 | 1 |
| Tim De Zarn | Mr. Krawczyk | Halb Daier | 2 | 1 |
| Tim Halligan | Howard | Farrakk | 1 | 1 |
| Tom McCleister | Larry | Kolos | 1 | 1 |
| Armin Shimerman | Levine | Audrid Dax, Herbert Rossoff, Mirror Quark | 1 | 3 |
| Hamilton Camp | Drunk | Leck | 1 | 2 |
| Brant Cotton | Ian Nevinger | Tauvid Rem | 1 | 1 |
| Carlos Lacamara | Ron Kennedy | Retaya | 1 | 1 |
| Chris Nelson Norris | Ivan Pachecko | Trajok | 1 | 1 |
| David Bowe | Father of Unicycle Boy | Basso Tromac | 1 | 1 |
| Jack Orend | Kyle | Human | 1 | 1 |
| John Davis Chandler | Thornberg | Flith | 1 | 1 |
| Lilyan Chauvin | Nurse Edna | Vedek Yassim | 1 | 1 |
| Marc Lawrence | Mr. Newton | Carl Zeemo | 1 | 1 |
| Michael Durrell | Bob Gilman | General Hazar | 1 | 1 |
| Michael Fairman | Mort Harris | Vendor | 1 | 1 |
| Robert Mandan | John Doe | Kotan Pa'Dar | 1 | 1 |
| Robert Symonds | Admiral Jay Jackson | Vedek Porta | 1 | 1 |
| Sandra Nelson | Michelle | Tavana | 1 | 1 |
| Albert Henderson | Olaf | Cos | 1 | 1 |
| Andrew Hawkes | Hagan | Amat'igan | 1 | 1 |
| Anthony Guidera | Firefighter | Cardassian | 1 | 1 |
| Barry Gordon | Baxter | Nava | 1 | 1 |
| Christopher Darga | Wilson | Commander Kaybok | 1 | 1 |
| Frank Novak | Ted | Businessman | 1 | 1 |
| Gabrielle Union | Tamara Davis | N'Garen | 1 | 1 |
| James MacDonald | Officer Gary McWayne | Captain Wainwright | 1 | 1 |
| Jeffrey King | Detective | Crewman Amaro | 1 | 1 |
| Joseph Culp | Roger | Raimus | 1 | 1 |
| Kay E. Kuter | Mr. Seaton | The Sirah | 1 | 1 |
| Martin Cassidy | Det. Gerald Leo | Merruk | 1 | 1 |
| Patrick Kilpatrick | Matthew Lindermulder | Reese | 1 | 1 |
| Paul Nakauchi | Harvard Candidate | Tygarian Officer Romah Doek | 1 | 1 |
| Rick Schatz | Max Fritzler | Gantt | 1 | 1 |
| Robert Kerbeck | J.B. Shanley | Cardassian Soldier | 1 | 1 |
| Rosie Malek-Yonan | Nazely | Tekoa | 1 | 1 |
| Sherman Howard | Mr. Schoenberger | Syvar | 1 | 1 |
| Amy Benedict | Mom | Bajoran Woman | 1 | 1 |
| Annie O'Donnell | Eve | Keena | 1 | 1 |
| Cynthia Graham | Ann Ferguson | Wheeler | 1 | 1 |
| Jeannetta Arnette | Mrs. Hawkes | Dr. Karen Loews | 1 | 1 |
| Lee Arenberg | Juke | Gral | 1 | 1 |
| Lisa Moncure | Scurry | Latia | 1 | 1 |
| Michael Krawic | Willow | William Samuels | 1 | 1 |
| Sarah MacDonnell | Maggie | Lieutenant Lisa Neeley | 1 | 1 |
| Betty McGuire | Georgette | Vayna | 1 | 1 |
| Harry Hutchinson | Hit and Run Driver | Trooper | 1 | 1 |
| Laura Jane Salvato | Kathy Murphy | Gia | 1 | 1 |
| Lori Lively | Helen | Siana | 1 | 1 |
| Deborah Van Valkenburgh | Louise Gavin | Detective Preston | 1 | 1 |
| Scott Burkholder | tbd | Commander Hilliard | 1 | 1 |
| Karen Hensel | Keller | Deela | 1 | 1 |
| Stephen Rowe | Mr. Franks | Chanting Monk | 1 | 2 |
| Eric Morgan Stuart | Tucker | Stairway Guard | 1 | 1 |
| Colby French | Greg Becton | Ensign Weldon | 1 | 1 |
| Kathryn Graf | Mrs. Adler | Bajoran Woman | 1 | 1 |
| Kevin McDermott | Gunderson | Alien Batter | 1 | 1 |
← ER × Star Trek: Deep Space Nine
Cast data from TVmaze, licensed CC BY-SA 4.0.