Actors in both Star Trek: Deep Space Nine and Star Trek: The Next Generation
102 actors have appeared in both Star Trek: Deep Space Nine and Star Trek: The Next Generation, across 354 episodes. The most-credited is Majel Barrett Roddenberry, Federation Computer, Lwaxana Troi, Narrator in Star Trek: Deep Space Nine and Computer, Lwaxana Troi, Narrator in Star Trek: The Next Generation.
| Actor | In Star Trek: Deep Space Nine | In Star Trek: The Next Generation | Eps | Eps |
|---|---|---|---|---|
| Majel Barrett Roddenberry | Federation Computer, Lwaxana Troi, Narrator | Computer, Lwaxana Troi, Narrator | 29 | 105 |
| Colm Meaney | Mirror Miles "Smiley" O'Brien, Albert Macklin, Falcon | Miles O'Brien | 7 | 53 |
| Marc Alaimo | Gul Dukat, Officer Burt Ryan | Badar N'D'D, Cmdr. Tebok, Frederick La Rouque | 37 | 4 |
| Max Grodénchik | Rom, Grand Nagus Gint, Mirror Rom | Par Lenor, Sovak | 36 | 2 |
| Rosalind Chao | Keiko O'Brien | Keiko O'Brien | 19 | 8 |
| Penny Johnson Jerald | Kasidy Yates, Cassie | Dobara | 16 | 1 |
| Salome Jens | Female Changeling | Humanoid Progenitor | 16 | 1 |
| Robert O'Reilly | Gowron, Countman | Gowron, Scarface | 8 | 5 |
| John de Lancie | Q | Q | 1 | 10 |
| Armin Shimerman | Audrid Dax, Herbert Rossoff, Mirror Quark | Betazoid Gift Box, DaiMon Bractor, Letek | 3 | 4 |
| Hana Hatae | Molly O'Brien | Molly O'Brien | 11 | 1 |
| Natalija Nogulich | Admiral Alynna Nechayev | Admiral Alynna Nechayev | 2 | 4 |
| Ann Gillespie | Nurse Jabara | Ensign Hildebrant | 4 | 1 |
| Richard Poe | Gul Evek | Gul Evek | 3 | 2 |
| Tony Todd | Adult Jake Sisko, Kurn | Kurn | 2 | 3 |
| Duncan Regehr | Shakaar Edon | Ronin | 3 | 1 |
| James Cromwell | Hanok | Jaglom Shrek, Nayrok | 1 | 3 |
| James Sloyan | Dr. Mora Pol | Alidar Jarok, K'Mtar | 2 | 2 |
| Thomas Kopache | Kira Taban | Engineer, Mirok | 2 | 2 |
| Vaughn Armstrong | Seskal, Gul Danar | Captain Korris | 3 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.