All 277 actors in both ER and Numb3rs
277 actors have appeared in both ER and Numb3rs, across 449 episodes. The most-credited is Montae Russell, Paramedic Dwight Zadro in ER and Officer at Scene in Numb3rs.
| Actor | In ER | In Numb3rs | Eps | Eps |
|---|---|---|---|---|
| Montae Russell | Paramedic Dwight Zadro | Officer at Scene | 117 | 1 |
| CCH Pounder | Dr. Angela Hicks | Lt. Lee Havercamp | 24 | 1 |
| Michael Beach | Al Boulet | Len Walsh | 19 | 1 |
| Matthew Yang King | Rick | Matt Li | 1 | 14 |
| Gloria Reuben | P.A. Jeanie Boulet | Erica Quimby | 13 | 1 |
| Sharif Atkins | Dr. Michael Gallant | Clay Porter | 12 | 2 |
| Lisa Vidal | Fire Lieutenant Sandy Lopez | Jessica Malloy | 12 | 1 |
| Leslie Silva | Sonya Bassett | M.E. Ridenhour | 1 | 9 |
| Susan Beaubian | Dr. Weiss | Stendhauser, FBI Computer Tech #2, FBI Tech Agent #1 | 1 | 9 |
| Bellina Logan | Nurse Kit Morton | Lawyer | 27 | 1 |
| Erica Gimpel | Adele Newman | Principal Riva Bell | 19 | 1 |
| Erik Palladino | Dr. Dave Malucci | Captain Adams | 5 | 1 |
| Lourdes Benedicto | Rena Trujillo | Estella Ramirez | 5 | 1 |
| Eion Bailey | Med Student Jake Scanlon | Cam | 10 | 1 |
| Dan Martin | Lieutenant | Detective Cates | 1 | 4 |
| Marcello Thedford | Leon | Dwight "Heavy" Reddick | 7 | 1 |
| Shawn Hatosy | Willis Peyton | Dwayne Carter | 1 | 3 |
| Tony Hale | Norman Chapman | Professor Russell Lazlo | 2 | 2 |
| Amanda Carlin | Librarian | Forensic Technician | 1 | 2 |
| Garret Dillahunt | Steve Curtis | Jack Tollner | 5 | 1 |
| Keith David | Pastor Watkins | Jeremiah Miller | 5 | 1 |
| Lorraine Toussaint | Yolanda | Agent Terri Green, Medical Examiner | 1 | 2 |
| Christian Clemenson | Dr. Kurtag | Henry Korfelt | 1 | 1 |
| J.K. Simmons | Gus Loomer | Dr. Clarence Weaver | 1 | 1 |
| Marilu Henner | Linda | Regina Landers | 1 | 1 |
| Mark Pellegrino | Nathan Conley | Tim Hamer | 1 | 1 |
| Robin Weigert | Nicole | Elaine Tillman | 1 | 1 |
| Steven Culp | Dave Spencer, Dr. Charles Cameron | Detective Graham Larson | 5 | 1 |
| Željko Ivanek | Bruce Resnick | William Fraley | 1 | 1 |
| Marc Jablon | Larry Weston | Meisner | 7 | 1 |
| Bruno Campos | Dr. Eddie Dorset | Randall Nespola | 5 | 1 |
| Chris Bruno | Richie | Tim King | 1 | 2 |
| François Chau | Neuro Resident | Kaj-Jan Chen | 2 | 1 |
| Josh Gad | Sgt. Bruce Larabee | Ron McGill | 1 | 2 |
| Lyle Kanouse | Mitch | Trainspotter | 1 | 2 |
| Raphael Sbarge | Mr. Kirkendall | Malcolm Galway | 2 | 1 |
| Roxanne Hart | Mrs. Kottmeier | Cris Carlyle | 2 | 1 |
| Shea Whigham | Bobby Kenyon | Tom Kardum | 2 | 1 |
| Hassan Johnson | Darnell Thibeaux | Calvin Bradley | 7 | 1 |
| Demetrius Grosse | Officer Newkirk | U.S. Marshal | 5 | 1 |
| Kim Strauss | Dr. Ari (Anesthesiologist) | Chandler Yates | 9 | 1 |
| Adam Goldberg | Joshua Shem | Chris McNall | 1 | 1 |
| Alan Rosenberg | Sam Gasner | Judge Franklin Trelane | 1 | 1 |
| Alanna Ubach | Terry's Friend | Paula Watson | 1 | 1 |
| Annie Campbell | Joanna | Wendy | 1 | 1 |
| Clea DuVall | Katie Reed | Melanie Bailey | 2 | 1 |
| Cleo King | Mrs. Davies | Rebecca James | 1 | 1 |
| Eugene Byrd | James Connor | Vic Mortiz | 1 | 1 |
| Gregg Henry | Officer Mark Downey | Pete Fox | 1 | 1 |
| Jeffrey D. Sams | Dr. Dorsey Watson | Mark Sutter | 1 | 1 |
| Jesse Head | Grinder Guy, Tommy Stevens | Gregory Dietrich | 2 | 1 |
| José Zúñiga | Eduardo Lopez | Bernardo Infante | 2 | 1 |
| Judith Scott | Mandy Smith | Judy Turner | 1 | 1 |
| Kevin Carroll | Clerk | Sensei | 1 | 1 |
| Kevin Tighe | Sgt. Pete Mattimore | Keith Watts | 1 | 1 |
| Michael Muhney | Colin Prentice | Lt. Joseph Karnes | 1 | 1 |
| Michael O'Neill | Col. Ken Kilner | Boyd Keene | 1 | 1 |
| Peter Onorati | Officer Nick Napolitano | Alfred McGurn | 1 | 1 |
| Ping Wu | Mr. Cheung | Steven Jintao | 1 | 1 |
| Samaire Armstrong | Tasha | Skyler Wyatt | 1 | 1 |
| Silas Weir Mitchell | Luis, Marcus Hainey | Darren Drew | 2 | 1 |
| Tom Amandes | David Gardner | Lawrence Dryden | 1 | 1 |
| John Prosky | Mr. Brooks | Kyle Holtzman | 4 | 1 |
| Castulo Guerra | Judge Alter, Javier | Paul Ridenhauer | 3 | 1 |
| Aldis Hodge | Brad Enloe, Young Man | Travis Watts | 2 | 1 |
| Dohn Norwood | MP, Mr. Persky | Captain Hazlett | 2 | 1 |
| Megan Gallagher | Kathy Snyder | Sarah Blakely | 2 | 1 |
| Scott MacDonald | Ambulance Driver, Detective | Lt. Barry Burchfield | 2 | 1 |
| Carol Locatell | Landlady | Elsie Korfelt | 1 | 1 |
| Connor Trinneer | EMT | Bob McHugh | 1 | 1 |
| Dennis Cockrum | Little League Player's Father | Jack Morrison | 1 | 1 |
| Don Harvey | Mr. Warshaw | Pritchard | 1 | 1 |
| Frederick Koehler | Benjamin Coe | Night Manager | 1 | 1 |
| Henri Lubatti | Victor | Garland St. Michael | 1 | 1 |
| Jayne Taini | Marge Satterfield | Marion Crane | 1 | 1 |
| Jeff Perry | Officer Mitch Palnick | Morton Standbury | 1 | 1 |
| Kevin Weisman | Glenn Krakowski | Bus Driver | 1 | 1 |
| Lesley Fera | Helen Kolber | ATF Agent Annie Wilson | 1 | 1 |
| Michael Gaston | U.S. Marshal Rick Cromley | Gil Fisher | 1 | 1 |
| Michael J. Harney | Mr. Stehly | U.S. Marshal | 1 | 1 |
| Molly Hagan | Meredith Smart | Fingerprint Technician | 1 | 1 |
| Ron Dean | Uncle Joey | Peter Watson | 1 | 1 |
| Ryun Yu | Baxter Yi | Young Chinese Man | 1 | 1 |
| Scott Menville | Beidermeier | Tyler | 1 | 1 |
| Shishir Kurup | Pakastani Student | Professor Sharad Varma | 1 | 1 |
| Tequan Richmond | Boy | Levi "Bishop" Holt | 1 | 1 |
| Wayne Péré | Eric Farve | Herbert Quilty | 1 | 1 |
| James Sie | Student #5 | FBI Tech, Lab Tech, ND FBI Agent | 1 | 4 |
| Bruce Nozick | Craig Simon | Dante's Attorney | 2 | 1 |
| George Gerdes | Jim Riley | Rail Cop Captain | 2 | 1 |
| Tito Ortiz | Carlos Lopez | Tino Alva | 2 | 1 |
| Tom Wright | Wharton | Coach Harry Streeling | 2 | 1 |
| Vyto Ruginis | Paramedic Wright | Mike Hiller | 3 | 1 |
| Alan Blumenfeld | Rob Savage | Store Owner | 1 | 1 |
| Allison Smith | Denny | Sara Lewis | 1 | 1 |
| Andrew Hawkes | Hagan | Vincent Costello | 1 | 1 |
| Andrew Rothenberg | Pauly Johnson | Chaney | 1 | 1 |
| Anne Dudek | Paula Gamble | Emmanueline Kirtland | 1 | 1 |
| Arye Gross | Kevin | Professor Stanley Novich | 1 | 1 |
| Bobby Preston | Clay Bennett | Jim | 1 | 1 |
| Cameron Dye | Damian's Dad | Roley | 1 | 1 |
| Corey Stoll | Dr. Teddy Marsh | Agent John Reacher | 1 | 1 |
| Cristos | Kingsley | Orson Hardee | 1 | 1 |
| Dale Dickey | Mrs. Price | Karen Miller | 1 | 1 |
| David Aaron Baker | Rufus Taylor | Geoff Morton | 1 | 1 |
| Deborah Strang | Mrs. Drane | Martha Biggs | 1 | 1 |
| Fran Bennett | Michelle, Phyllis | Estelle Brown | 2 | 1 |
| Franc Ross | Naughton | Wayne Osborne | 1 | 1 |
| Jacob Vargas | Diablo | Victor Borrego | 1 | 1 |
| Jamie McShane | Josh Rushing | Paul Ballard | 1 | 1 |
| Jeff Kober | Stuart | Brady | 1 | 1 |
| John Mariano | Leonard | Derrick Lamberg | 1 | 1 |
| John Rubinstein | Dr. Kenner | Gene Evans | 1 | 1 |
| LisaGay Hamilton | Nadine Hopkins | Sari Kinshasa | 1 | 1 |
| Mark Harelik | James | Taylor Brindell | 1 | 1 |
| Meera Simhan | Mandy | Asha Rafiq | 1 | 1 |
| Michael Shamus Wiles | Battalion Chief Bukata | Carl Baker | 1 | 1 |
| Nicole Bilderback | Claire | Tina Tran | 1 | 1 |
| Pat Crawford Brown | Mrs. Votey | Older Woman | 1 | 1 |
| Paul Hipp | Craig Turner | Gray McClaughlin | 2 | 1 |
| Richard Cox | Rick Mathers | Edward Barret | 1 | 1 |
| Sam Murphy | John Murphy | Ernie Fuller | 1 | 1 |
| Stephen Lee | Mr. Dressler | Tony Wolf | 1 | 1 |
| Tom Everett | Mr. Kazlaw | Keith Whittaker | 1 | 1 |
| Andy Umberger | Dr. David Harvey | Frank Auster | 2 | 1 |
| Gina Hecht | Radiology Tech | Margaret Skinner | 2 | 1 |
| Matt Gottlieb | Dr. Ashley | Doctor | 2 | 1 |
| Michael Bryan French | Dr. MacGruder | Mr. Montgomery | 2 | 1 |
| Armin Shimerman | Levine | Patrick Holden | 1 | 1 |
| Brent Briscoe | Eli Ebee | Guard | 1 | 1 |
| Caroline Lagerfelt | Andrea | Rose Harris | 1 | 1 |
| Chris Butler | Cop | Cliff Howard | 1 | 1 |
| Chris Conner | Mr. Reinhart | Dr. Dan Matthews | 1 | 1 |
| Craig Tsuyumine | Japanese Businessman 2 | Reporter | 1 | 1 |
| Erika Alexander | Vatima Abika | U.S. Marshal Tricia Yaegger | 1 | 1 |
| Gary Carlos Cervantes | Cop | Victor | 1 | 1 |
| Hattie Winston | Singing Woman | Eileen | 1 | 1 |
| Jim Cody Williams | Boudreau | Calvin Oates | 1 | 1 |
| Larry Clarke | Male Lawyer | James Malin | 1 | 1 |
| Mary Anne McGarry | Alice Wakely | Landlady | 1 | 1 |
| Paul Vincent O'Connor | tbd | Max Flaherty | 1 | 1 |
| Richard Edson | Vinnie La Fontaine | Nick Rowland | 1 | 1 |
| Richard Fancy | Mr. Thomas | Thomas Galway | 1 | 1 |
| Rusty Schwimmer | Grollman | Deanne Drake | 1 | 1 |
| Sara Botsford | Mrs. Calder | Susan Weinar | 1 | 1 |
| Shannon Cochran | Mrs. Klingman | Doctor Iverson | 1 | 1 |
| Thomas Kopache | Dr. Stofsky | Officer | 1 | 1 |
| Tom Irwin | Gabriel Milner | Dr. Stephen Atwood | 1 | 1 |
| Wendy Gazelle | Julie Hembree | Colleen McCrary | 1 | 1 |
| Rhyon Nicole Brown | Erika Crawford, Wendy | Lucy Fuñes Moreno | 2 | 1 |
| Sam Ayers | Mike Murphy | FTRA Attacking Guy, News Vendor | 1 | 2 |
| Alexandra Krosney | Trina | Josesphine Kirtland | 1 | 1 |
| Alyson Reed | Ginny | Eva Salton | 1 | 1 |
| Anjul Nigam | Ghandar | Dr. Renfro | 1 | 1 |
| Clyde Kusatsu | Review Board Doctor #1 | Artifact Seller | 1 | 1 |
| Colin Campbell | Fireeater | Meth Chemist #1 | 1 | 1 |
| Daniel Bess | Marshall | Julien Curtis | 1 | 1 |
| Eltony Williams | Rossen | Supervising Banger | 1 | 1 |
| Jack Guzman | Morgan | Carlos Ruiz | 2 | 1 |
| James DuMont | Clemens | Vendor | 1 | 1 |
| Jillian Armenante | Tamara Gordon | Claire Wells | 1 | 1 |
| Jon Curry | Karl | Detective | 1 | 1 |
| Jon Spinogatti | Obnoxious Bald Guy | Motel Manager | 1 | 1 |
| Judith Moreland | Nurse Terry | Fremont | 1 | 1 |
| Julie Dretzin | Shelly | Karen Griffiths | 1 | 1 |
| Kurt Caceres | Luis Sanchez | Agent Romero | 1 | 1 |
| Lacey Kohl | Pratt's Date | Susanna Weisz | 1 | 1 |
| Madison Davenport | Claire O'Fallon | Julia Rausch | 1 | 1 |
| Mark Tymchyshyn | Mr. Pruitt | Dr. Lawrence Bainsworth | 1 | 1 |
| Michael Ralph | Mr. Alexander | Sam Finney | 1 | 1 |
| Philip Casnoff | Dr. Dan Litvak | Maurice Connors | 1 | 1 |
| Ray Baker | Durant | Jack Bennett | 1 | 1 |
| Rod McLachlan | Tohill | Bill McClelland | 1 | 1 |
| Russell Edge | CT Tech | Deputy Sheriff | 3 | 1 |
| Stephen Spinella | Henry Lotery | Hans Stollbach | 1 | 1 |
| Tessa Auberjonois | Helena | Arlene Montgomery | 1 | 1 |
| Victor Raider-Wexler | Vascular Doctor | Eddie Zarkarian | 1 | 1 |
| William Charlton | Man | Ryan McCall | 1 | 1 |
| Aaron McPherson | Dennis King | Agent #1 | 1 | 1 |
| Angela Paton | Mrs. Ransom | Mrs. Janas Meloy | 1 | 1 |
| Bernard White | Addict seeking Rapid Detox | Frank Hagen | 1 | 1 |
| Brett Rickaby | Vincent Hales | Steve Savard | 1 | 1 |
| Bubba Lewis | Dennis | Zack Wilson | 1 | 1 |
| Charles Hittinger | Michael Leary | Kevin Oliver | 1 | 1 |
| David A. Kimball | tbd | Maynard | 1 | 1 |
| David Clennon | Jared Morgan | Mel Oliver | 1 | 1 |
| David Warshofsky | Hostage Negotiator | Detective Jack Collins | 1 | 1 |
| Dean Chekvala | Mugger | Yuri Chernov | 1 | 1 |
| Dylan Kenin | Louie | Roger Holstein | 1 | 1 |
| Erin Cottrell | Claire | Caroline Williams | 1 | 1 |
| Jamie Starr | Hilo | Toby | 1 | 1 |
| John Gleeson Connolly | Dan Udecker | Arvin Lindell | 1 | 1 |
| Mel Winkler | Charles Sanberry | Vincent | 1 | 1 |
| Paul Cassell | Ed Gamble | Daniel Piermint | 1 | 1 |
| Ronnie Gene Blevins | Nemo Baker | Mutt | 1 | 1 |
| Stephanie Childers | Hilary | Nancy Olin | 1 | 1 |
| Susan Merson | Mrs. Blum | Brenda Aronson | 1 | 1 |
| Toni Torres | Lorraine | SWAT Guy's Wife | 1 | 1 |
| Tony Longo | Angel Dust Junkie | Big Chucky Rollins | 1 | 1 |
| Chris Freeman | Firefighter Deshazo, Oliver Miles | Mechanic | 2 | 1 |
| Albert Owens | Cardiologist Zane | Lawyer | 1 | 1 |
| Barry Shabaka Henley | Detective | Coach Grady | 1 | 1 |
| Bob Rusch | Lillion | Man #1 | 1 | 1 |
| Breon Gorman | Mrs. Arrida | Older Woman | 1 | 1 |
| Brian Cousins | Allman | Matt Pribitech | 1 | 1 |
| David Allen Brooks | Dr. Gunn | Substitute | 2 | 1 |
| Jack Shearer | Hal Grunwald | Peter Evans | 1 | 1 |
| Jim Gleason | Little Girl's Father | Senator Martin Tallman | 1 | 1 |
| Ken Meseroll | Mr. Sawyer | Captain Joe MacNevish | 1 | 1 |
| Kyle Colerider-Krugh | Martin | Ralph Jackson | 1 | 1 |
| Lucia Brawley | Officer Janet Shatford | Undercover Officer | 1 | 1 |
| Lynn Wanlass | Margo Aikin | Frail Woman | 1 | 1 |
| Marcus Chait | Kyle | Jordan Hughs | 1 | 1 |
| Michael Maize | James | Wallace "Demento" Gordon | 1 | 1 |
| Nick Jaine | Scrub Nurse | Benjamin Rajar | 1 | 1 |
| Nike Doukas | Mrs. O'Connor | Leigh Everett | 1 | 1 |
| Stephanie Erb | Mrs. Kinney | Linda Samuelson | 1 | 1 |
| Ann Hearn | Shelly Dunleavy | Kevin's Mother | 1 | 1 |
| Armando Molina | Sgt. Pete Jackson | Raul Hernandez | 1 | 1 |
| Arnell Powell | Del | Security Patrol #1 | 1 | 1 |
| Cody Estes | Rudy | Ryan Kramer | 1 | 1 |
| Emerson Brooks | Gonzalez | Cop | 1 | 1 |
| Frank Novak | Ted | John Taddeo | 1 | 1 |
| Geoffrey Rivas | Haven | Det. Ray Reynolds | 1 | 1 |
| Grace Phillips | Mrs. Brower | Lucinda Shay | 1 | 1 |
| Jeff Corbett | Mike Dodds | Surfer #2 | 1 | 1 |
| Jeremy Glazer | Med Student David | Clayton Caswell | 1 | 1 |
| Kathleen Mary Carthy | Nurse Blake | N.D. FBI Agent | 1 | 1 |
| Kevin Fry | Detective Demetras | McDowd | 1 | 1 |
| Melody Garrett | Jackie Teller | Super | 1 | 1 |
| Susan Krebs | Transplant Surgical Nurse | Librarian | 1 | 1 |
| William Francis McGuire | Alan's Father | C.O. Lee Kettrick | 1 | 1 |
| Ana Maria Lagasca | Tina Garcia | Theresa | 1 | 1 |
| Art Chudabala | Greg | Danny Phan | 1 | 1 |
| Eric Lange | Rod Stillman | Skipper | 1 | 1 |
| Eva Kaminsky | Mrs. Andrews | Manager | 1 | 1 |
| Jamaal Carter | Teenager | Bone | 1 | 1 |
| Jeffrey Hutchinson | Richard Weingarten | Brian Walters (The Immortal) | 1 | 1 |
| John Lacy | Kevin Poole | Police Detective | 1 | 1 |
| Josh Clark | Officer McCauly | Sgt. Ronald Jackson | 1 | 1 |
| Kim Estes | Lieutenant Higgins | Mr. Bowden | 1 | 1 |
| Larry Herron | Mitch Kellems | Technician | 1 | 1 |
| Linda Kerns | Mrs. Bohlmeyer | Barbara Taddeo | 1 | 1 |
| Michael Cavalieri | Mr. Fazio | Benny Natale | 1 | 1 |
| Robert Della Cerra | Bucci | Security Patrol #2 | 1 | 1 |
| T'Shawn Barett, Jr. | Yates | Valet | 1 | 1 |
| Takayo Fischer | Trinnie | Bai Lan Zhou | 1 | 1 |
| April Hong | Anesthesiologist | Schoolgirl | 1 | 1 |
| Bruce Turk | Jasper | Mark Vaughn | 1 | 1 |
| Caryn West | Mrs. Bender | Jennifer Milton | 1 | 1 |
| Cisco Reyes | Officer Tim Daniels | Lucky Dog | 1 | 1 |
| Geno Monteiro | Fred | LAPD Cop #1 | 1 | 1 |
| George Ketsios | Bachelor #4 | Victim #5 | 1 | 1 |
| Maura M. Knowles | Mrs. Sawyer | Mother | 1 | 1 |
| Will Beinbrink | Wick | Malcolm | 1 | 1 |
| Annamarie Kenoyer | Ruthie Pooler | Junior High Kid | 1 | 1 |
| Cesar Flores | Oscar | Battered Latino Kid | 1 | 1 |
| David Figlioli | Nolan | Kevin Merriman | 1 | 1 |
| James Martin Kelly | Mednick | Nevelson | 1 | 1 |
| Mark Ankeny | Electrician | Jim Newell | 1 | 1 |
| Randy Kovitz | Dr. Black | Engineer | 1 | 1 |
| Robert Dolan | Pediatrician | Officer Arnold Owens | 1 | 1 |
| Sybyl Walker | Flight Nurse Fran | Doctor | 1 | 1 |
| Joe Marinelli | Joey | Phillip Berelli | 1 | 1 |
| Terry Woodberry | Cop | Paramedic | 1 | 1 |
| Ulysses Cuadra | Jamie | Robber #2 | 1 | 1 |
| Dean Shelton | Todd | Joshua Kramer | 1 | 1 |
| Terrence Hardy, Jr. | Lucas Kirk | Malik Shabaz | 1 | 1 |
| Travis McKenna | Mr. DeMisa | Oren | 1 | 1 |
| Vanita Harbour | Bad Driver | Valma Howard | 1 | 1 |
| Christine Avila | Corazon | Trudy Perez | 1 | 1 |
| David Carrera | T.J. | Grim Man | 1 | 1 |
| David Parker | Gary Sutton | Brennan Sommers | 1 | 1 |
| Geoffrey Wade | Darrell Amos | Defense Attorney | 1 | 1 |
| Gino Montesinos | Officer Nunez | James Shane | 1 | 1 |
| James Leo Ryan | Tony Welling | Lance Cummings | 1 | 1 |
| Ned Schmidtke | Cal | Roy Detchemendy | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.