All 94 actors in both Brooklyn Nine-Nine and ER
94 actors have appeared in both Brooklyn Nine-Nine and ER, across 484 episodes. The most-credited is Joel McKinnon Miller, Norm Scully, Earl Scully in Brooklyn Nine-Nine and Mr. Emerson in ER.
| Actor | In Brooklyn Nine-Nine | In ER | Eps | Eps |
|---|---|---|---|---|
| Joel McKinnon Miller | Norm Scully, Earl Scully | Mr. Emerson | 23 | 1 |
| Dirk Blocker | Michael Hitchcock | Mr. Groder | 22 | 1 |
| Nasim Pedrad | Kate | Nurse Suri | 1 | 9 |
| Bradley Whitford | Roger Peralta | Sean O'Brien | 4 | 2 |
| Merrin Dungey | Sharon Jeffords | Daphina | 5 | 1 |
| Aida Turturro | Maura Figgis | Sheryl Hawkins | 2 | 3 |
| Paul Adelstein | Seamus Murphy | Hank Loman, Paul | 3 | 2 |
| Mike Hagerty | Captain McGintley | Mr. James | 3 | 1 |
| Stacy Keach | Jimmy Brogan | Mike Gates | 1 | 3 |
| Tara Karsian | Mara Ciprioni | Liz Dade | 1 | 7 |
| Garret Dillahunt | Dave Majors | Steve Curtis | 1 | 5 |
| L. Scott Caldwell | Judge Laverne Holt | Dr. Rabb | 1 | 2 |
| Reggie Lee | Dr. Ronald Yee | Christian | 2 | 1 |
| Perry Anzilotti | Reggie Bludsoe | Dr. Perry (Anesthesiologist), Ed | 1 | 22 |
| Christopher Michael | Desk Sergeant Hank | Security Officer | 2 | 5 |
| David Figlioli | Dan "Daniel" Valdano | Nolan | 1 | 1 |
| J.K. Simmons | Frank Dillman | Gus Loomer | 1 | 1 |
| Marilu Henner | Vivian Ludley | Linda | 5 | 1 |
| Nicole Bilderback | Captain Julie Kim | Claire | 1 | 1 |
| Romy Rosemont | Elaine Nixon | Joanne Bairos | 1 | 1 |
| Bob Minor | Will Yuarint | Security Guard, Buck, Officer Jenkins | 1 | 4 |
| Bertila Damas | Camila Santiago | Dr. Debra Wexler | 2 | 1 |
| Frederick Koehler | Becca Boyle | Benjamin Coe | 2 | 1 |
| Jim O'Heir | Sheriff Reynolds | McKenna | 2 | 1 |
| Zoran Radanovich | Silvio Nucci | Niko Kovač | 1 | 3 |
| Audrey Wasilewski | Cindy Shatz | Officer Wetterling | 1 | 1 |
| Derick Alexander | Airport Official | Hospital Officer | 1 | 3 |
| Garry Marshall | Marvin Miller | Harry Feingold | 1 | 1 |
| Kim Estes | George Kenderson | Lieutenant Higgins | 1 | 1 |
| Lance Barber | Patrick | Howard | 1 | 1 |
| Marcus Folmar | Ronald Palmer | Foreman | 1 | 1 |
| Nick Offerman | Frederick | Rog | 1 | 1 |
| Nicole J. Butler | Sylvia Dunnes | Anesthesiologist | 2 | 1 |
| Niecy Nash | Debbie | Judith Anderson | 1 | 1 |
| Sterling K. Brown | Philip Davidson | Bob Harris | 1 | 1 |
| Tim Powell | Chief Garmin | Mannon | 2 | 1 |
| Carlease Burke | Muriel | Policewoman | 1 | 1 |
| Dennis Cockrum | Deputy Inspector Flynt | Little League Player's Father | 1 | 1 |
| Jernard Burks | Impound Supervisor | Expectant Father | 1 | 1 |
| K Callan | Carol | Kelly Robinson | 1 | 1 |
| Steven Lee Allen | Boban | Contractor | 1 | 1 |
| Corey Allen Kotler | The Super | Hairy Guy | 1 | 1 |
| Eddie Pepitone | Leo Sporm | Dying Patient | 1 | 1 |
| Irina Davidoff | Russian Lady | Vlada | 1 | 1 |
| K.T. Thangavelu | Mrs. Stratton | Dr. Subramanian | 1 | 2 |
| Luis Moncada | Randall | Rogelio | 1 | 1 |
| Matthew Jones | Dr. Millford Cream | Cop | 1 | 1 |
| Norma Michaels | Mildred Lench | Rose Franklin | 1 | 1 |
| Ricardo J. Chacon | Airport Cop | Eddie | 1 | 1 |
| Richard Penn | David | Dave Donovan | 1 | 1 |
| Shelley Robertson | Celine | Tanya Phillips | 1 | 1 |
| Tom Proctor | Rake | Bloody Man | 1 | 1 |
| Robert Maffia | Gio Costa | Perfusionist | 1 | 2 |
| Annie Korzen | Estelle | Mrs. Grunwald | 1 | 1 |
| Bob McCracken | Frank Spond | Ring | 1 | 1 |
| Brent Briscoe | Matthew Langdon | Eli Ebee | 1 | 1 |
| Carrie Armstrong | Roena Luesto | Instructor | 1 | 1 |
| Harry Yi | Henderson | Phil | 1 | 1 |
| Martin Garcia | Matt Blarkn | Airline Employee | 1 | 1 |
| Ric Sarabia | Little Santa | Drunk | 1 | 1 |
| Steve Tom | Kellan Heller | MacPherson | 1 | 1 |
| Douglas Bennett | Chico | Martin | 1 | 1 |
| Eltony Williams | Clancy Thomas | Rossen | 1 | 1 |
| Joe Sabatino | Benny | Pilot | 1 | 1 |
| Marque Richardson II | Brian Jensen | Saga | 1 | 1 |
| Phil Abrams | Uncle Bob | Rodney | 1 | 1 |
| Rocky McMurray | Chief Aggerton | Sergeant Myers | 1 | 1 |
| Stewart Skelton | Patrick Faricy | John Taylor | 1 | 1 |
| Alice Lo | Woman at Mahjong | Lenore Fong | 1 | 1 |
| Darlene Kardon | Grammy Nona Boyle | Elderly Woman | 1 | 1 |
| Harvey J. Alperin | Joseph | Dr. Saunders | 1 | 1 |
| Irene Roseen | Estelle Glour | Inez | 1 | 1 |
| Joey Diaz | Sal | Grocery Store Clerk | 1 | 1 |
| Lou George | Edmund Grail | Driver | 1 | 1 |
| Nick DeMauro | Tony | Zumbano | 1 | 1 |
| Peter James Smith | Ron | Mr. Shimahara | 1 | 1 |
| Vincent Duvall | Sid Wells | Father | 1 | 1 |
| Wayne Lopez | Uniformed Cop | Benitez | 1 | 1 |
| Ingo Neuhaus | Alfonso | Cop, McNally | 1 | 2 |
| Carole Gutierrez | Beth Nurminstein | Landlady | 1 | 1 |
| Joshua Dov | Shane Broadman | Matt | 1 | 1 |
| Pamela Shaddock | Nurse Elrog | Reporter Winslow | 1 | 1 |
| Steven M. Gagnon | Deputy Commissioner Grayson | Dr. Blum | 1 | 1 |
| Cici Lau | Woman at Mahjong | Mrs. An | 1 | 1 |
| Colin Campbell | Evan Spekesup | Fireeater | 1 | 1 |
| Kent Shocknek | Slade Austin | Newsreporter | 1 | 1 |
| Bruno Amato | Mario | Sheriff | 1 | 1 |
| Danny Belrose | Gus Wimbledon | Joey | 1 | 1 |
| Adam Lieberman | Agent Nathan Clarke | Levine | 1 | 1 |
| Doreene Hamilton | Gemma | ICU Nurse | 1 | 1 |
| Michael Albala | Albert | County Anesthesiologist | 1 | 1 |
| Bunnie Rivera | Jury Forewoman | Maria | 1 | 1 |
| E.J. Callahan | Ernest Zumowski | Drunk | 1 | 1 |
| Judith Scarpone | Judge Mindel | Grace Linden | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.