All 182 actors in both NCIS and The West Wing
182 actors have appeared in both NCIS and The West Wing, across 662 episodes. The most-credited is Lily Tomlin, Penelope Langston in NCIS and Deborah Fiderer in The West Wing.
| Actor | In NCIS | In The West Wing | Eps | Eps |
|---|---|---|---|---|
| Lily Tomlin | Penelope Langston | Deborah Fiderer | 1 | 34 |
| Teri Polo | Vivian Kolchak | Helen Santos | 2 | 18 |
| Alan Dale | Tom Morrow | Mitch Bryce | 16 | 2 |
| Karis Campbell | Navy Lt. Elaine Taylor | Ronna | 1 | 21 |
| Melinda McGraw | Diane Sterling | Jane Braun | 6 | 4 |
| Michael O'Neill | Former NCIS Special Agent Riley McCallister | Secret Service Agent Ron Butterfield | 3 | 14 |
| Tim Kelleher | NCIS Special Agent Christopher "Chris" Pacci | Dylan Clark | 5 | 2 |
| Michael Nouri | Mossad Director Eli David | Roy Turner | 5 | 1 |
| Matthew Del Negro | Balboa | Bram Howard | 1 | 16 |
| Kathleen York | Stephanie Flynn | Andrea Wyatt | 1 | 15 |
| Jesse Bradford | John Bishop | Ryan Pierce | 1 | 9 |
| Patricia Richardson | Judy Price Fielding | Sheila Brooks | 1 | 9 |
| Steven Culp | Navy Cmdr. William Skinner | Speaker of the House Jeff Haffley | 1 | 9 |
| Brigid Brannagh | Senator Constance Miller, Catherine Reynolds | Harriet | 3 | 1 |
| Jack Conley | Metro Detective Danny Sportelli | Major Anderson | 3 | 1 |
| Rocky Carroll | Director Leon Vance | Corey Sykes | 3 | 1 |
| Danica McKellar | Erin Kendall | Elsie Snuffin | 1 | 8 |
| James Morrison | CIA Assistant Director Jonathan Overmeier, U.S. Senator John Phillips | Colonel Jessie Weiskopf | 2 | 1 |
| Roma Maffia | NCIS Special Agent Vera Strickland | Officer Rhonda Sachs | 2 | 1 |
| Taye Diggs | Marine Gunnery Sergeant Aaron Davis | Secret Service Agent Wesley | 1 | 2 |
| William Devane | Nicolas Mason | Lewis Berryhill | 1 | 2 |
| Ramón de Ocampo | Navy Lieutenant Thomas Gorman | Otto | 1 | 10 |
| Evan Arnold | Gareth Bainbridge | Ned | 1 | 9 |
| Glenn Morshower | Cmdr. Robert Peters | Mike Chysler | 1 | 9 |
| Michael Hyatt | Judy Williams | Angela Blake | 1 | 6 |
| Carl Lumbly | Navy Rear Admiral Beau Hindley | Jeff Breckenridge | 1 | 1 |
| Christian Clemenson | Perry Sterling | Evan Woodkirk | 1 | 1 |
| Christopher Lloyd | Joseph "Joe" Smith | Professor Lawrence Lessig | 1 | 1 |
| Claire Coffee | Nikki Crawshaw | Cassie Tatum | 1 | 3 |
| Don S. Davis | MTAC Control Officer | Reverend Don Butler | 1 | 1 |
| Geoff Pierson | Roy Carver | Senator Tripplehorn | 1 | 3 |
| Gregory Itzin | FBI Director, Spencer Downing | State Department Representative | 3 | 1 |
| James Eckhouse | Fred Cabrisio | Rep. Bud Wachtell | 1 | 1 |
| Nick Searcy | Joseph Barnes | Nate Singer | 1 | 1 |
| Ray Wise | Wayne Tobett | Governor Tillman | 1 | 1 |
| Brett Cullen | Navy Capt. Todd Gelfand | Governor Ray Sullivan | 2 | 5 |
| H. Richard Greene | Thomas Victor | Robert Royce | 1 | 6 |
| Dennis Cockrum | NSA Tech, Senator | Military Officer | 2 | 3 |
| Alanna Ubach | NSA Senior Intelligence Analyst Sofia Martinez | Celia Walton | 2 | 1 |
| Carlos Gómez | Admiral Carlos Mendoza, Reyes | Admiral McGill | 2 | 1 |
| Dean Norris | Vestman | Steve Hodder | 1 | 2 |
| John Getz | Walter Kane | Congressman Mark B. Sellner | 1 | 2 |
| Mitch Pileggi | U.S. Secretary of Defense Wynn Crawford | Senator Dresden | 2 | 1 |
| Scott Lawrence | DEA Agent Raymond Frank, Navy Captain Thomas Lind | Congressional Staffer | 2 | 1 |
| Steven Eckholdt | Navy Cmdr. Dr. Brad Pitt | Doug Westin | 1 | 5 |
| Suleka Mathew | Navy Commander Maria Castro | Ms. Chakrabarty | 1 | 2 |
| Wilson Cruz | Todd Ryder | Jack Sosa | 1 | 2 |
| Ryan Cutrona | Ray Beringer | CIA Director George Rollie | 1 | 6 |
| Lee Garlington | Mary Hanlan | Alana Waterman | 1 | 3 |
| Richard Riehle | Walt Osorio | Officer Jack Sloan | 2 | 2 |
| Terry O'Quinn | Colonel Will Ryan | General Nicholas Alexander | 1 | 7 |
| Tim Lounibos | Det. Paul Atwood | Colonel Leahy | 1 | 3 |
| Victor McCay | Ash | Henry | 1 | 5 |
| Annie Corley | Deputy Secretary of State Elliot | Mary Marsh | 1 | 2 |
| Benjamin Brown | Marine Capt. Arvidas | Mike | 1 | 3 |
| Brooks Almy | Mrs. McDonald | Tessa | 1 | 1 |
| Christopher Cousins | Jordan Jones | Congressman Thiele | 1 | 1 |
| Cleo King | Della Robinson | Marla Worisky | 1 | 2 |
| Daniel Roebuck | Port Security Chief Matthew Lake | Lieutenant Buckley | 1 | 1 |
| Erinn Hayes | Wendy Hill | Laura | 1 | 1 |
| George Wyner | Randall Worthington | Congressman Simmel | 1 | 1 |
| Hal Holbrook | Mickey Stokes | Albie Duncan | 1 | 2 |
| Jamie McShane | Samuel Hayes | Dr. Hardin | 1 | 1 |
| Jeffrey Pierce | Marine Sgt. Michael McMannis | Jeff Johnson | 1 | 1 |
| Jim Beaver | Captain Tom O’Rourke | Carl | 1 | 1 |
| Lauren Stamile | Metro P.D. Detective Michelle Lane | Layla Cham | 1 | 1 |
| Matt McCoy | Senator Thomas Bransfield | Congressman Tom Landis | 1 | 1 |
| Matthew Glave | Navy Commander John McGee | Scott Holcomb | 1 | 1 |
| Rebecca Creskoff | Hillary Taffet | Sarah Jordan | 1 | 1 |
| Reiko Aylesworth | Anne Marshall | Janine | 1 | 1 |
| Robert Knepper | Benson Long | Morgan Ross | 1 | 1 |
| Sal Landi | Bill Zaprowski, Cmdr. Stovic | Chafey | 2 | 1 |
| Sam Anderson | Walter Carmichael | John LaSalle | 1 | 1 |
| Scott Michael Campbell | Robert Miller | Donald Dolan | 1 | 1 |
| Seth Adkins | Sean Hodges | Cody Zucker | 1 | 1 |
| Spencer Garrett | Commander Spenser | Richard Will | 1 | 1 |
| Tim Guinee | Bart Lemming | Steve Laussen | 1 | 1 |
| Todd Waring | Albert James "Jamie" Beck | Rep. Rathburn | 1 | 1 |
| Vernée Watson | Miss Helen Frimkes | Nurse | 1 | 1 |
| Natalija Nogulich | Judge Maddox | Israeli Ambassador Shira Galit | 1 | 3 |
| CCH Pounder | Jefferson Parish Coroner Doctor Loretta Wade | Deborah O'Leary | 2 | 1 |
| Bellamy Young | ATF Agent Melinda Stone | MaryLou Meriwether | 1 | 1 |
| Blue Deckert | Federal Marshal | Congressman Borden | 1 | 1 |
| Brian Stepanek | Karl Chunk | Senator's Aide | 1 | 1 |
| Bruce French | Floyd Vernon | Bill Stark | 1 | 1 |
| Daniel Zacapa | Detective Martin Alonzo | Esteban 'Steve' Hernandez | 1 | 1 |
| Eric Lange | William Lafferty | Paul Tyminski | 1 | 1 |
| Erick Avari | Col. Dan McClafferty | Pakistani Ambassador Habib | 1 | 1 |
| John Kapelos | Vice Principal Vic Castor | Seymour Little | 1 | 1 |
| Julian Acosta | Matt Burns | Leon Montero | 1 | 1 |
| Kathleen Garrett | Judge Mary Branigan | Congresswoman | 1 | 1 |
| Linda Gehringer | Michelle Stark | Jennifer Lydell | 1 | 1 |
| Marcelo Tubert | Nazar Boulos | Palestinian Prime Minister Saeb Mukarat | 1 | 3 |
| Michael Chieffo | Randy Devereaux | Head of FEMA | 1 | 1 |
| Michael Reilly Burke | Frank Connell | Bill Brewer | 1 | 1 |
| Mike Starr | Monroe Cooper | Senator Tony Marino | 1 | 1 |
| Navid Negahban | Jimmy Shaloub | Maz | 1 | 1 |
| Nicki Micheaux | Metro P.D. Detective Martha Mayer | Muriel | 1 | 1 |
| Patrick Fischler | George Stenner | Walter Sprout | 1 | 1 |
| Paul Schulze | Marine Major Ken Meyers | Terrance Sligh | 1 | 1 |
| Peter MacKenzie | Jack Murdoch | George Rohr | 1 | 1 |
| Stephen Lee | Chuck Bayliss | Registered Voter | 1 | 1 |
| Tom Bower | Sheriff Miller Thompson | General Barrie | 1 | 1 |
| Tom Everett | CIA Head of Intelligence Kirkwood Zaysen | Agent Charles Frost | 1 | 3 |
| William O'Leary | Chief Martin Freydano | Deputy Fish and Wildlife | 1 | 1 |
| Andy Umberger | FBI Agent Freedman | Cal Mathis | 1 | 2 |
| Clyde Kusatsu | Benjamin Franklin, Mister Takumi Rin | Joe | 2 | 1 |
| Alex Fernandez | Joseph Flores | Andy Lazon | 2 | 1 |
| Alex Hyde-White | Dr. Adam Tallridge | Andy's Accoster | 1 | 1 |
| Amy Stewart | Katie Happ | Lisa Zimmer | 1 | 1 |
| Basil Wallace | Delphin Abaka | McKonnen Loboko | 1 | 1 |
| Brent Huff | Rig Foreman | Agent Broder | 1 | 1 |
| Bruce Gray | CIA Director Roper | Otis | 1 | 1 |
| Christina Chang | NCIS Special Agent Valeri Page | Alex Moreau | 1 | 1 |
| Christopher Maher | Capt. Aris Mahir | Iranian Ambassador | 2 | 1 |
| David Shatraw | Bobby Quinn | Ed Merridy | 1 | 1 |
| Gregg Daniel | Parking Enforcement Officer Riggs | Steve Adamley | 1 | 1 |
| John Billingsley | Jackson Scott | Dr. John Fallow | 1 | 1 |
| John Cothran, Jr. | Alfred Holbrook | Civilian Advisor | 1 | 2 |
| Ken Lerner | Albert Hencheck | Congressman Marino | 1 | 1 |
| Kirsten Nelson | Beth Banks | Young Mrs. Dolores Landingham | 1 | 1 |
| Madison Mason | Marine Lt. Colonel Bushnell | Admiral Hackett | 1 | 1 |
| Mark L. Taylor | Dr. Harvey Kimball | Steve Rorsche | 1 | 1 |
| Megan Ward | Laura Rowens | Jane | 1 | 1 |
| Nancy Linehan Charles | Ruthann Harrison | Oncologist | 1 | 1 |
| Nathan Anderson | Luke Walters | Matthew Lambert | 1 | 1 |
| P.J. Byrne | Ross Logan | David Orbitz | 1 | 1 |
| Randy Oglesby | Army Brigadier General Scott Oliver | Alcoholic Politician | 1 | 1 |
| Steve Rankin | Sgt. Bill Atlas | FBI Officer | 1 | 1 |
| Eli Danker | Mossad Officer Michael Bashan | Israeli Defense Minister Doran Mazar | 1 | 2 |
| Lawrence Pressman | Dr. Russell Pike, Secret Service Director | Ken Cochran | 2 | 1 |
| Ned Schmidtke | Congressman Frank Getz | Admiral, Industry Leader | 1 | 2 |
| Albie Selznick | Marty Allen | Documentarian | 1 | 1 |
| Audrey Wasilewski | Shirley Wilkes | Janice Trumbull | 1 | 1 |
| Bernard White | Afghani Ambassador Qasim Saydia | Dr. Essan Mohebi | 1 | 1 |
| Bradley White | Bart Powell | James | 1 | 1 |
| David Clennon | Max Ellswood | Vinick's Attorney | 1 | 1 |
| Don McManus | Mark Stafford | Greg Summerhays | 1 | 1 |
| Gina Hecht | Christine Newhall | Julie | 1 | 1 |
| John Rubinstein | Bob | Senator Andy Ritter | 1 | 1 |
| Kenneth Tigar | Diggar Aldridge | Congressman Gladman | 1 | 1 |
| Larry Brandenburg | Hubble | Senator Michael Jackson | 1 | 1 |
| Lou Beatty, Jr. | Issac Curtis | Wilson Burke | 1 | 1 |
| Michael Gaston | Maj. Dougherty | Eric Hayden | 1 | 1 |
| Ming Lo | Davey Chen | Yahlin | 1 | 1 |
| Robert Picardo | Retired Marine Gunnery Sergeant Dale Harding | E. Bradford Shelton | 1 | 1 |
| Robin Thomas | Dr. Neil Fleming | Senator Jack Enlow | 1 | 1 |
| Shelley Robertson | Navy Captain Beverly Sharp | Brenda Burke | 1 | 1 |
| Steven Anderson | Professor Daniel Redner | Daniel Rubin | 1 | 1 |
| Steven Flynn | Roman Sobchek | Mark Brookline | 1 | 1 |
| William Russ | Philip Wickes | Dan | 1 | 1 |
| Jerry Kernion | Pastor Alan, Scott Rowe | The Driver | 2 | 1 |
| Aaron Lustig | Doctor Victor Kalsa | Jerry Graham | 1 | 1 |
| Andrew Borba | Doctor Phillip Heller | Alan Zwick | 1 | 1 |
| Daniel Hugh Kelly | Admiral Kendall | James Cook | 1 | 1 |
| Edmund L. Shaff | Security Guard George | Bill Horton | 1 | 1 |
| Eyal Podell | Namir Eschel | Michael Gordon | 1 | 1 |
| Holmes Osborne | Fred Hanlan | Congressman Peter Lillienfield | 1 | 1 |
| Iqbal Theba | Ramesh Sengupta | Indian Ambassador | 1 | 1 |
| Jim Abele | Army Colonel Holt Driscoll | Congressman Benoit | 1 | 1 |
| Matt Malloy | George Pardo | Herb | 1 | 1 |
| Sara Botsford | Dr. Helen Berkley | Jenny McGarry | 1 | 1 |
| Shashawnee Hall | Police Chief Walen | Russell Angler | 1 | 1 |
| Tom Gallop | Victor Sterling | Bruce | 1 | 1 |
| Barbara Eve Harris | FAA Director Stacy Bergin | Gretchen Tyler | 1 | 1 |
| Bennet Guillory | Henry | Rep. Jackson | 1 | 1 |
| Chris Ellis | Gunnery Sgt. John Deluca | Congressman Fields | 1 | 1 |
| David Barrera | Charlie Milla | Jorge Santos | 1 | 1 |
| Leon Russom | Grandpa | Network President | 1 | 1 |
| Mark Hutter | U.S. Ambassador James Ealy | Rep. Erickson | 1 | 1 |
| Michael Holden | Dr. Wayne Dobson | Network President | 1 | 1 |
| Robert Curtis Brown | Gary Tolin | Jamie Hotchkiss | 1 | 1 |
| Scott Klace | Dr. Timothy Hass | Democratic Congressional Campaign Committee Rep. | 1 | 1 |
| Scott MacDonald | Militia Leader | Cyrus Yolander | 1 | 1 |
| Victor Raider-Wexler | Patrick Carmody | Bernie | 1 | 1 |
| Gerry Becker | William Baer | Network President | 1 | 1 |
| Paul Perri | Man | Steve Joyce | 1 | 1 |
| Richard Fancy | Leonard Weiss | Congressman | 1 | 1 |
| Adrian Sparks | Hugo Radcliffe | Dr. Wexler | 1 | 1 |
| Kevin West | Mario | Randy Wysniewsky | 1 | 1 |
| Daniel Mandehr | Officer Adler | Israeli Diplomat | 1 | 1 |
| Jeff Williams | Doctor | Harold Lewis | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.