All 83 actors in both NCIS and The O.C.
83 actors have appeared in both NCIS and The O.C., across 600 episodes. The most-credited is Alan Dale, Tom Morrow in NCIS and Caleb Nichol in The O.C..
| Actor | In NCIS | In The O.C. | Eps | Eps |
|---|---|---|---|---|
| Alan Dale | Tom Morrow | Caleb Nichol | 16 | 14 |
| Michael Nouri | Mossad Director Eli David | Neil Roberts | 5 | 19 |
| Samaire Armstrong | Melissa Goodman | Anna Stern | 1 | 15 |
| Shannon Lucio | Amy Harrison | Lindsay Gardner | 1 | 12 |
| Elayn J. Taylor | Odette Malone | Dr. Harris | 5 | 2 |
| Jeff Hephner | Navy Commander Peter "Banshee" Sheridan | Matt Ramsey | 1 | 13 |
| Kim Oja | Karen Wilkerson | Taryn Baker | 1 | 9 |
| Colin Hanks | DOD IG Investigator Richard Parsons | Grady Bridges | 3 | 1 |
| Jeri Ryan | Rebecca Chase | Charlotte Morgan | 1 | 7 |
| T.J. Thyne | Fletcher Voss, Carl | Larry Bernstein | 3 | 1 |
| Brandon Quinn | Gregg Abell | Spencer Bullit | 1 | 6 |
| Gary Grubbs | Coroner Elmo Poke | Gordon Bullit | 1 | 6 |
| Chris Carmack | Kevin Nelson | Luke Ward | 1 | 2 |
| Kathleen York | Stephanie Flynn | Renee Wheeler | 1 | 4 |
| Nicholas Gonzalez | David Silva | D.J. | 1 | 6 |
| Al Sapienza | Maurice Riva, Cmdr. William Foley | Club Owner | 3 | 1 |
| Danielle Bisutti | Secret Service Special Agent Ashley Winter | Joan | 1 | 5 |
| Daphne Ashbrook | Donna Peyton | Dawn Atwood | 1 | 5 |
| Gregory Itzin | FBI Director, Spencer Downing | Steven Herbert | 3 | 1 |
| José Zúñiga | Navy Capt. Dr. Adrian De La Casa | Jason Spitz | 1 | 3 |
| Lamont Thompson | Sommers | Greg Hodes | 1 | 4 |
| Ellen Hollman | NCIS Special Agent Tina Larsen | Young Kirsten | 2 | 1 |
| Brian McNamara | Noah Sykes | Carson Ward | 1 | 3 |
| Jeff Witzke | Attendant | News Correspondent, Sales Guy | 2 | 2 |
| Christopher Cousins | Jordan Jones | Greg Fisher | 1 | 1 |
| Garrett M. Brown | Retired Marine General James Wallace | Dr. Kenneth Woodruff | 1 | 2 |
| Lorna Scott | Sally Parker | Beatrice | 1 | 2 |
| Shaun Duke | Azid Abu Selom | Dr. Henry Griffin | 1 | 4 |
| Todd Bosley | FBI Tech | Leon | 1 | 3 |
| Henri Lubatti | Andre Yorka | Henri-Michel de Momourant | 1 | 2 |
| Michael Adler | Navy Capt. Burger | Jeff Frenkel | 1 | 2 |
| Erick Avari | Col. Dan McClafferty | Dr. Overbee | 1 | 1 |
| Kevin Rankin | Dennis Moran | Lucas | 1 | 1 |
| Michael Reilly Burke | Frank Connell | Tom Wellington | 1 | 1 |
| Wilson Bethel | P.O. John Kirby | Brad | 1 | 1 |
| Kevin West | Mario | Mr. Bendis | 1 | 2 |
| Perry Anzilotti | Ted Rogers | Mr. Greenberg | 1 | 2 |
| Stephen O'Mahoney | CEO Paul Newhope | Cop #1 | 1 | 2 |
| Chase Kim | SRT Sniper | Seung Ho | 1 | 3 |
| Katherine Disque | Mary Barrett | Lynn | 1 | 3 |
| Blake Robbins | Navy Commander Scott Martin | Don | 1 | 2 |
| David Paluck | Dir. Glenn Webb | Cop, Inspector | 1 | 2 |
| Devin Sidell | Dark Woman A.K.A. Angela Russell | Abigail Stevens | 1 | 2 |
| Eric Allan Kramer | Phillip Ekkerly | Soccer Coach | 1 | 1 |
| Gwendoline Yeo | NCIS Special Agent Joanna Wright | Amy | 1 | 1 |
| Stacey Hinnen | Delivery Driver | Gruff Bondsman | 1 | 1 |
| Tom Wright | Warden Sam Kelleher | Paul Glass | 1 | 1 |
| Lily Rains | Nora Williams | Nurse | 1 | 2 |
| Alaina Huffman | Dana Arnett | Yvette | 1 | 1 |
| Andrew Thacher | West Virginia State Trooper Sergeant Paul Westgard | Jail Cop | 1 | 1 |
| Channon Roe | Sergeant Gordon Lambro | Jake | 1 | 1 |
| Francis Capra | Eddie Castillo | Z | 1 | 1 |
| Frank Crim | Resident Manager | Landlord | 1 | 1 |
| Gilbert Glenn Brown | Chief Security Officer Carson Granger | Officer Patrick | 1 | 1 |
| Jonathan Kowalsky | Nate Holt | Fan Boy | 1 | 1 |
| Matt Crabtree | Curt Carver | Scientist | 1 | 1 |
| Mim Drew | Marie | College Counselor | 1 | 1 |
| Paul Ganus | Department of Energy Deputy Director Doyle Roden | Sean Harper | 1 | 1 |
| Robert Picardo | Retired Marine Gunnery Sergeant Dale Harding | Bill Merriam | 1 | 1 |
| Samantha Quan | Amy Linden | Receptionist | 1 | 1 |
| Taivon McKinney | TSA Agent Tammy Gantry | Student #2 | 1 | 1 |
| Alain Uy | Ray Kessel | Miguel | 1 | 1 |
| Burnadean Jones | Sally Smith | Woman in Plain Suit | 1 | 1 |
| Catherine Kresge | Marine Lance Corporal Stella Brooks | Cherilyn Featherbrook | 1 | 1 |
| Rodney Rowland | Operations Officer Jonah McGuire | Jack Harper | 1 | 1 |
| Sterling Jones | Marine Captain Dale Martens | Cool Rock Guy | 1 | 1 |
| Aaron Ramzi | Amir Hassan | Samir | 1 | 1 |
| David Rountree | FBI Surveilance Technician | Trucker Hat Guy | 1 | 1 |
| Gina Gallego | Judge Monica Fernandez | Eva Diaz | 1 | 1 |
| Jack Guzman | Wade | Bouncer | 1 | 1 |
| Jeremy Brandt | Corpsman | Jeff Granzow | 1 | 1 |
| Ray Laska | Defense Minister Andor Gorgova | Esbenshade | 1 | 1 |
| Sean Blakemore | Navy Chief Petty Officer Jerome Carr | Trauma Dr. | 1 | 1 |
| Steven M. Gagnon | CIA Director Roger Kirkwood | Arson Investigator | 1 | 1 |
| Marc Vann | Mark Sadowski | Detective Warner | 1 | 1 |
| Phil Abrams | Hotel Manager | Mr. Sheeran | 1 | 1 |
| Rob Brownstein | Wayne Gordon | Kurt Williams | 1 | 1 |
| Robert Mammana | Sheriff Greg Pearson | Investor | 1 | 1 |
| Jesse Heiman | Frederick Pippin | Winking Comic Book Nerd | 1 | 1 |
| Kimberly Atkinson | NCIS Special Agent Roberta Wells | Neighbor | 1 | 1 |
| Michael Canaan | MP | Cop #3 | 1 | 1 |
| Rigo Sanchez | Boyfriend | EMT | 1 | 1 |
| Tom Billett | Viggo Trellis | Policeman | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.