All 89 actors in both CSI: Vegas and NCIS
89 actors have appeared in both CSI: Vegas and NCIS, across 549 episodes. The most-credited is Joel Johnstone, Jack Nikolayevich in CSI: Vegas and Micah Flynn in NCIS.
| Actor | In CSI: Vegas | In NCIS | Eps | Eps |
|---|---|---|---|---|
| Joel Johnstone | Jack Nikolayevich | Micah Flynn | 13 | 1 |
| Derek Webster | Dr. Milton Hudson | Major Joe Sacco, Marine Capt. Stengel | 10 | 2 |
| Jamie McShane | Anson Wix | Samuel Hayes | 6 | 1 |
| Robert Curtis Brown | Undersheriff Cade Wyatt | Gary Tolin | 4 | 1 |
| A.J. Tannen | Roland Woodall | Mossad Agent, Grant Lancaster | 1 | 3 |
| Mark Atteberry | Ronald Winter Sr. | Medgar Nash | 1 | 1 |
| Raphael Sbarge | Scott Jackson | Rupert Kritzer | 1 | 1 |
| T.J. Ramini | Rick Aziz | Mossad Officer Malachi Ben-Gidon | 1 | 3 |
| Sumalee Montano | Jennifer Huang | NCIS Special Agent Nicole Taggart | 1 | 2 |
| Lolita Davidovich | Jeanette Folsom | Catherine Tavier | 3 | 1 |
| Andrew Elvis Miller | Calvin Wawrzecki | Sam Novak | 1 | 1 |
| Benito Martinez | Raphael Tarquenio | Detective Conklin | 2 | 1 |
| Chelsey Crisp | Emma Hodges | Grace Penland | 2 | 1 |
| Christy St. John | Holly Prince | Lt. Renee Harlan | 1 | 1 |
| Elyse Levesque | Lynda Tasker | Frauke Biedermann | 1 | 1 |
| Nanrisa Lee | D.A. Lauren Tate | Inspector General Regina Ward | 2 | 1 |
| Patrick Cage | Lamont Moore | Taye Tanner | 2 | 1 |
| Stephen Friedrich | Ted Hester | Sid | 2 | 1 |
| Tobias Jelinek | Jeremiah Dalt | Bodie Whitman | 1 | 1 |
| Reggie Lee | Undersheriff Bobby Zhao | Jonathan Chow | 2 | 1 |
| Rich Ceraulo Ko | Mark | North Carolina State Trooper Muncie Tyson | 2 | 1 |
| Tony Winters | Frank | Admiral Gene Halverson | 2 | 1 |
| David Paladino | Adam Tyner | Retired Navy Senior Chief P.O. Diego De La Rosa | 4 | 1 |
| Chris Browning | Sawyer Locke | NCIS REACT Supervisory Special Agent Tom Dalton | 1 | 1 |
| Christopher Redman | Dean Paul Canto | Carl Fleming | 1 | 1 |
| Dahlia Salem | Dr. Lydia Amato | Maria De La Rosa | 1 | 1 |
| Dendrie Taylor | Theresa Clinton | Janet LaCombe | 1 | 1 |
| Judy Kain | Dr. Heather Chumani | Gladys Stone | 1 | 1 |
| Kathe Mazur | Mrs. Tate | Vice Admiral Dawn Tyson | 1 | 1 |
| Lisa LoCicero | Tawny Tyler | Elena Devol | 1 | 1 |
| Oliver Muirhead | Gary Snyder | Jay Danorth | 1 | 1 |
| Robert Picardo | Carlo Rey | Retired Marine Gunnery Sergeant Dale Harding | 1 | 1 |
| Rory O'Malley | Doug Pfefferman | Cliff | 1 | 1 |
| Shelley Robertson | CPS Officer Mary Phlippen | Navy Captain Beverly Sharp | 1 | 1 |
| Stevie Lynn Jones | Christy | Shayna Reynolds | 1 | 1 |
| Zach Tinker | Warren Bart | David West | 1 | 1 |
| Mark Engelhardt | Pete Trask | Kent Marshall | 1 | 2 |
| William Allen Young | Professor Gene Morrow | FBI Director Barry Hutchins, U.S. Secretary of Defense Moses McClaine | 1 | 2 |
| Johnny Rey Diaz | Guillermo | Victor Medina | 3 | 1 |
| Anthony L. Fernandez | Calvin Dupree | Luis Carter | 1 | 1 |
| Cyd Strittmatter | Eleanor Wilton | Joanne Wright | 1 | 1 |
| Eric Allan Kramer | Bob Auerbach | Phillip Ekkerly | 1 | 1 |
| Gabriel Tigerman | Cliff Roland | Max Comey | 1 | 1 |
| Izzy Diaz | Martin Kline | Nelson Ast | 1 | 1 |
| Joe Adler | Ron Kean | Matthew Gray | 1 | 1 |
| Randy Oglesby | Ralph Cicero | Army Brigadier General Scott Oliver | 1 | 1 |
| Troy Winbush | Janitor Bing | Former Marine 1st Lieutenant Sam Keeler | 1 | 1 |
| Al Coronel | Chip Tyler | Metro P.D. Lieutenant Wilton Buck | 1 | 1 |
| Arlene Santana | Detective Zaya | Navy Chief of the Boat Constance Shaw | 1 | 1 |
| Chris Sheffield | Robbie Downs | Vince | 1 | 1 |
| Darri Ingolfsson | Ronald Winter | Dwight Colton | 1 | 1 |
| Don McManus | Lou Sherbourne | Mark Stafford | 1 | 1 |
| Joseph C. Phillips | A.G. Michael Rhodes | Phillip Conway | 1 | 1 |
| Joshua Brockington | Theo Lavelle | Navy Petty Officer Third Class Felix Cross | 1 | 1 |
| Matt Kaminsky | Harry Pallatine | Henry Spivey | 1 | 1 |
| Peter Jang | Thief Two | Navy Commander James Willis | 1 | 1 |
| Richard Whiten | Benny | Police Lt. Jody Hampton | 1 | 1 |
| Tom Degnan | Tyler Clement | Lonnie Davis | 1 | 1 |
| Brady Smith | Jeremiah Beck | David Cross | 1 | 1 |
| Brennan Keel Cook | Cory Hollis | Travis Williams | 1 | 1 |
| Dustin Ingram | Rollie Emmer | Ozzie Duncan | 1 | 1 |
| Erica Piccininni | Young Jeanette | Navy Lieutenant Clea Thorson | 1 | 1 |
| John Gloria | Rick Yates | George Kaydar | 1 | 1 |
| Kaipo Schwab | Dr. Apan | FBI Assistant Special Agent in Charge Liam McCullers | 1 | 1 |
| Kirk Bovill | Seymour Finch | Richard Sims | 1 | 1 |
| Missy Yager | Mary Trask | Michelle Davison | 1 | 1 |
| Brea Bee | Shelly Walker | Mrs. Richter | 1 | 1 |
| Craig Gellis | Kenneth Miller | Civilian Crewman #1 | 1 | 1 |
| George Tsai | Officer Chung | Nurse Keith Johnson | 1 | 1 |
| Rick Gifford | Sergeant Wilcox | State Dept. Special Agent Smith | 1 | 1 |
| Stephen Oyoung | Dr. Evan Cho | Navy Captain Andrew Hubbard | 1 | 1 |
| Tristan Cunningham | CPS Agent | Nurse Janeway | 1 | 1 |
| Carlos Acuña | Tiny | Milo the Guard | 1 | 1 |
| D.C. Douglas | Rob Carter | Tom Speakman | 1 | 1 |
| Darren Dupree Washington | Marty Eisenstein | Security Guard | 1 | 1 |
| Hilda Boulware | Ruth | Madam Foreperson | 1 | 1 |
| Joshua Dov | Denny Trask | Portland Douglas | 1 | 1 |
| Kevin Fonteyne | Jared Ott | Boyfriend in diner | 1 | 1 |
| Tessa Munro | Trish Eisenstein | Travis's Mom | 1 | 1 |
| Capri-Antoine Vaillancourt | William | Navy Sailor Myers | 1 | 1 |
| Darryl Alan Reed | Guard | Cabbie | 1 | 1 |
| Rueben Grundy | Howard Rossman | Philadelphia P.D. Detective Dubrow | 1 | 1 |
| Scott Subiono | Intake Sergeant | Louis Lancaster | 1 | 1 |
| Travis Joe Dixon | Firetruck Driver | Navy Chief Petty Officer Leland Wiley | 1 | 1 |
| Tripp Pickell | Captain Wilson | Petty Officer Pete Bidwell | 1 | 1 |
| Braxton Hale | Anton Koslov | Colin | 1 | 1 |
| Bryan Marcos | Van Marlowe | Pilot #3 | 1 | 1 |
| Andrew Hwang | Doctor | Nervous Asian Man | 1 | 1 |
| Travis Johns | Jonah Tanner | Martin Curtis | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.