All 117 actors in both Drop Dead Diva and NCIS
117 actors have appeared in both Drop Dead Diva and NCIS, across 586 episodes. The most-credited is Scottie Thompson, Jocelyn Harold in Drop Dead Diva and Jeanne Benoit in NCIS.
| Actor | In Drop Dead Diva | In NCIS | Eps | Eps |
|---|---|---|---|---|
| Scottie Thompson | Jocelyn Harold | Jeanne Benoit | 1 | 18 |
| Liza Lapira | Abby Halstead | NCIS Special Agent Michelle Lee | 1 | 12 |
| Seamus Dever | Tyler Mack | NCIS Deputy Director Gabriel LaRoche, Graham Thomas | 1 | 7 |
| Jaime Ray Newman | Vanessa Hemmings | Navy Lieutenant Commander Melanie Burke | 10 | 2 |
| Paula Newsome | Wanda Williams | Jackie Vance | 1 | 4 |
| Victor McCay | Judge Halloran | Ash | 8 | 1 |
| Brigid Brannagh | Molly Hagen | Senator Constance Miller, Catherine Reynolds | 1 | 3 |
| Greg Germann | Judge Zahn | NCIS Deputy Director Jerome Craig | 1 | 3 |
| Virginia Williams | Belinda Scotto | Leah Ramsey | 2 | 2 |
| Doug Savant | Jakob Yordy | Larry Clannon, Marine Brigadier General Daniel Kent | 1 | 2 |
| Roma Maffia | Judge Eileen Sears | NCIS Special Agent Vera Strickland | 1 | 2 |
| Adam J. Harrington | Attorney Carlyle | Coast Guard Commander Sam Hendrix | 4 | 1 |
| Alicia Coppola | Dr. Dumont | Faith Coleman | 1 | 3 |
| David Berman | Hank Spencer | Isaac Wren | 5 | 1 |
| Jeffrey Pierce | Ian Holt | Marine Sgt. Michael McMannis | 3 | 1 |
| Mark Atteberry | Ray Bradford | Medgar Nash | 1 | 1 |
| Raphael Sbarge | Donny Gibson | Rupert Kritzer | 1 | 1 |
| Ray Wise | Frank Dodd | Wayne Tobett | 1 | 1 |
| Arnell Powell | D.A., Judge Powell | Abraham Moussalah | 4 | 1 |
| Gil McKinney | Ben Logan | Crewman, Logan Donahue | 1 | 2 |
| Jack McGee | Warden Richard Steckler | Det. Floyd, Richard "Rick" Jordan | 1 | 2 |
| Alimi Ballard | Jack Dillingham | NCIS Special Agent Gayne Levin | 1 | 3 |
| Bruce Davison | Judge Cyrus Maxwell | Lester Burm | 3 | 1 |
| Kevin Sizemore | Eddie Davis | M.P. Mueller, Marine Sgt. Moore, Stuart Greco | 1 | 3 |
| Mary Mouser | Chloe Surnow | Kelly Gibbs | 1 | 4 |
| Ashley Jones | Sheila Reese | Nancy Douglas | 1 | 1 |
| Brianna Brown | Hannah Baker | Melinda Martin | 1 | 1 |
| Charlene Amoia | Lonna Wycott | Denise Mancuso | 1 | 1 |
| Chris Carmack | Brian Young | Kevin Nelson | 1 | 1 |
| Chris Payne Gilbert | Seth Coyle | Wesley Rowan | 1 | 1 |
| Christopher Cousins | Dr. Bradley Alton | Jordan Jones | 1 | 1 |
| Corey Sorenson | Drew Prescott | Anthony Paxton | 1 | 1 |
| Elizabeth Bond | Bev Globerman | Karen Graham | 1 | 1 |
| Jessica Tuck | Kathy Jenkins | Gloria Caplinger | 1 | 1 |
| John Allen Nelson | D.A. Callahan | JSOC Vice Admiral Lloyd Manditsky | 1 | 1 |
| Josie Loren | Nina | Jane | 1 | 1 |
| Kevin Alejandro | Michael Fernandez | Jaime Jones | 1 | 1 |
| Lauren Stamile | Charlotte Perkins | Metro P.D. Detective Michelle Lane | 1 | 1 |
| Lorraine Toussaint | Professor Ellen Daily | Deputy Director Donna Wolfson | 1 | 1 |
| Reiko Aylesworth | June Fraizer | Anne Marshall | 1 | 1 |
| Scott Michael Campbell | Mike Barry | Robert Miller | 1 | 1 |
| Steve Valentine | Henri Malik | Miles Wolf | 1 | 1 |
| Steven Culp | Bruce Forman | Navy Cmdr. William Skinner | 1 | 1 |
| Teri Polo | Jillian Ford | Vivian Kolchak | 1 | 2 |
| Michael Lowry | AAG Joe Lowry | Lt. Com. Akron, Thomas Mulligan | 2 | 2 |
| Bellamy Young | Emily Parcelles | ATF Agent Melinda Stone | 1 | 1 |
| Brennan Elliott | Todd Prentiss | Martin Stillwell | 1 | 1 |
| David Burke | Phillip Neely | George Ingram | 1 | 1 |
| Greg Perrow | Glenn | Firefighter Dawson | 1 | 1 |
| Gregory Harrison | Brandon Tharpe | Navy Captain Roland Ebbakey | 1 | 1 |
| James Martin Kelly | Elliott Rollins | Mookie Perkins | 1 | 1 |
| James Martinez | Luis Vega | Navy Lt. Eduardo Almeida | 1 | 1 |
| Jeff Hephner | Coach Jack | Navy Commander Peter "Banshee" Sheridan | 1 | 1 |
| John Gabriel Rodriquez | Theo | DEA Special Agent Luis "Mitch" Mitchell | 1 | 1 |
| John Posey | Franklin Rhodes | Lance Simmons | 1 | 1 |
| Kari Coleman | Mrs. Tildon | Maggie Scott | 1 | 1 |
| Lindsey McKeon | Reesa | Taylor Matthews | 1 | 1 |
| Michael Reilly Burke | Steve Vaught | Frank Connell | 1 | 1 |
| Olesya Rulin | Mia Dalton | Kim Troutman | 1 | 1 |
| Patrick Fabian | Kevin Hanson | Ray Vincent | 1 | 1 |
| Trevor Donovan | Keith | Navy Commander Thomas Buckner | 1 | 1 |
| Zack Ward | Keith Geary | Police Officer Billy Krieg | 1 | 1 |
| Bryce Johnson | Eric Hayes | Eddie Macklin, Navy Lieutenant David Shankton | 1 | 2 |
| Bess Armstrong | Rita Kaswell | U.S. Senator Denise O’Hara | 1 | 1 |
| Charlie Bodin | Stuart Cannon | Keith Messier | 1 | 1 |
| David Andrews | The Walters' lawyer | U.S. Secretary of Defense Errol Coyne | 1 | 1 |
| Garrett Hines | Dan Webber | Marine Lance Corporal Samuel Cross | 1 | 1 |
| Gary Hudson | Walter Clark | Detective John Fioscher | 1 | 1 |
| Jason MacDonald | Gunman | John Watts | 1 | 1 |
| Jenny O'Hara | Carla Shane | Alice Brodie | 1 | 1 |
| John Billingsley | Mitch Fredericks | Jackson Scott | 1 | 1 |
| Justin Welborn | Dennis Fullman | John Zaprowski | 1 | 1 |
| Kenneth Mitchell | Rick Keller | Nathan Curtis | 1 | 1 |
| Kim Johnston Ulrich | Caitlin Andrews | Nancy Hargrove | 1 | 1 |
| Larry Poindexter | Dr. Preminger | Dr. Berman | 1 | 1 |
| Steve Kazee | Dustin Wycott | Michael Locke | 1 | 1 |
| Susan Walters | Vicki Wellner | Marcy Brooks | 1 | 1 |
| Tina Lifford | Judge | Dr. Fox | 1 | 1 |
| Wayne Péré | Parole Comissioner | Stanley Springer | 1 | 1 |
| Ziah Colon | Olivia | Pilar Rivera | 1 | 1 |
| Jennifer Gatti | Attorney Ines Bedell, Bar Prosecutor | Negotiator Arkin | 2 | 1 |
| Briana Lane | Sierra Santell | Diane Boyle | 1 | 1 |
| Conor Dubin | Adam Bay | Jeremy Pryor | 1 | 1 |
| Courtney Ford | Gwen Walsh | Navy Petty Officer 2nd Class Kaylen Burrows | 1 | 1 |
| Darin Cooper | Richard Dale | Roy Evans | 1 | 1 |
| David Gautreaux | Walter Burr | Richard Colford | 1 | 1 |
| Holley Fain | Wendy Berg | Audrey Daly | 1 | 1 |
| Jaleel White | Bob | Martin Thomas | 1 | 1 |
| Jon Wellner | Calvin | Simon Frankel | 1 | 1 |
| Marcus Brown | A.D.A. Paul Saginaw | Navy Petty Officer Dominic Dimarco | 1 | 1 |
| Myndy Crist | Myndy Billmeyer | Jennifer Vickers | 1 | 1 |
| Rebecca Tilney | Mary Biltman | Madeline Dumont | 1 | 1 |
| Roark Critchlow | Anton Horn | Wayne Grossman | 1 | 1 |
| Rodney Scott | Howard Kasper | Brian Dempsey | 1 | 1 |
| Teri Wyble | Rachel | Kendra Allston | 1 | 1 |
| Tyler Jacob Moore | Dan | Richie Rose | 1 | 1 |
| Victor Webster | Gary Rice | Dane Hogan | 1 | 1 |
| Cheryl White | Francine Watters | Rebecca Biddle | 1 | 1 |
| Donald Sage MacKay | Dr. Landers | Navy Commander Kerry Killmartin | 1 | 1 |
| Gabriel Olds | Simon Dewey / Jake Garner | Gregg Norvell | 1 | 1 |
| Josh Randall | Stuart Kane | Navy Commander Ryan Barnes | 1 | 1 |
| Melissa Ponzio | Selette Garner | Drew Turner | 1 | 1 |
| Merle Dandridge | Nadine Comer | Marcy Carruthers | 1 | 1 |
| Rob Boltin | Marty Saddler | Marine Capt. Rod Newell | 1 | 1 |
| Rya Kihlstedt | Ellie Chapin / Mayor of Malibu | Linda Idleton | 1 | 1 |
| Alexandra Holden | Becca Holt | Brooke Fenten | 1 | 1 |
| Brian Ames | Roger O'Neil | Matthew Duques | 1 | 1 |
| Donny Boaz | George Randal | Navy Lieutenant Kit Jones | 1 | 1 |
| Jeff Wincott | Security Chief | Marine Gunnery Sgt. Leeka | 1 | 1 |
| John O'Brien | Nathan Blagman | Bruce | 1 | 1 |
| Christopher Gartin | Mr. Hess | Jason Tupperman | 1 | 1 |
| E. Roger Mitchell | Mr. Beaty | M.P. | 1 | 1 |
| Ravi Naidu | Dorji Tashi | Doctor | 1 | 1 |
| William Ragsdale | Alan Peterson | Brett Creevy | 1 | 1 |
| Jon Lindstrom | Professor Sharf | Perry Davidson | 1 | 1 |
| Wiley Pickett | Wiley Pickett | Navy Captain David Wade | 1 | 1 |
| Dane Northcutt | Ken | Marine Major Kerry | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.