Actors in both NCIS and Without a Trace
172 actors have appeared in both NCIS and Without a Trace, across 668 episodes. The most-credited is Margo Harshman, Delilah Fielding in NCIS and Harley Palmer in Without a Trace.
| Actor | In NCIS | In Without a Trace | Eps | Eps |
|---|---|---|---|---|
| Margo Harshman | Delilah Fielding | Harley Palmer | 21 | 1 |
| Liza Lapira | NCIS Special Agent Michelle Lee | Layla | 12 | 1 |
| Susanna Thompson | Army Lt. Col. Hollis Mann | Cynthia Neuwirth | 8 | 1 |
| Seamus Dever | NCIS Deputy Director Gabriel LaRoche, Graham Thomas | Ronald Phelps | 7 | 1 |
| Brigid Brannagh | Senator Constance Miller, Catherine Reynolds | Stephanie Boothe | 3 | 1 |
| Jack Conley | Metro Detective Danny Sportelli | Mike Carter | 3 | 1 |
| John Finn | Marine Commandant Charles T. Ellison | Abner Harrington | 3 | 1 |
| Megan Gallagher | Under Secretary of the Navy Jennifer Leo | Mrs. Freedman | 3 | 1 |
| Michael O'Neill | Former NCIS Special Agent Riley McCallister | Thomas Shannon | 3 | 1 |
| Stephanie Venditto | Dr. Jane Leisten | Dr. Lisa Harris | 1 | 3 |
| T.J. Thyne | Fletcher Voss, Carl | Duncan | 3 | 1 |
| Brett Cullen | Navy Capt. Todd Gelfand | Greg Pritchard | 2 | 1 |
| Robert Pine | Congressman Theodore Randolph, Golfer Ben | Roger Toland | 2 | 1 |
| Tamara Taylor | NCIS Special Agent Cassie Yates | Tracy McAllister | 2 | 1 |
| Alex Veadov | International Mercenary Sergei Mishnev | Goran Davits | 3 | 1 |
| Alexandra Krosney | Nadia Harcourt | Young Lianna Sardo | 1 | 1 |
| Bruce Davison | Lester Burm | Paul Cartwright | 1 | 1 |
| Conor O'Farrell | William Danforth | Graham Spaulding | 1 | 3 |
| Elizabeth Morehead | Medical Corpsman | Emily's Sister | 1 | 1 |
| Gregory Itzin | FBI Director, Spencer Downing | Sydney's Co-worker | 3 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.