All 54 actors in both Hawaii Five-O and Star Trek
54 actors have appeared in both Hawaii Five-O and Star Trek, across 363 episodes. The most-credited is George Takei, Nathaniel Blake in Hawaii Five-O and Lt. Hikaru Sulu, Mirror Sulu in Star Trek.
| Actor | In Hawaii Five-O | In Star Trek | Eps | Eps |
|---|---|---|---|---|
| George Takei | Nathaniel Blake | Lt. Hikaru Sulu, Mirror Sulu | 1 | 47 |
| Mark Lenard | Commander Hawkins, Dan Bok, Rogloff | Ambassador Sarek, Romulan Commander | 4 | 2 |
| Roger C. Carmel | Misha the Bear | Harcourt Fenton "Harry" Mudd | 3 | 2 |
| Joanne Linville | Dr. C.L. Fremont, Camilla Carver | Romulan Commander | 3 | 1 |
| Michael Strong | Fred Grayson, Harry Maguire, Meredith Howell | Dr. Roger Korby | 3 | 1 |
| James Gregory | Jonathan Kaye, Mike Finney | Dr. Tristan Adams | 2 | 1 |
| Stewart Moss | Ned Horvath | Hanar, Joe Tormolen | 1 | 2 |
| Barry Russo | Abilleno, Albert Jovanko, Eddie Rizzo | Lt. Cmdr. Giotto, Wesley | 4 | 2 |
| John Colicos | Lorenzo Corman, Mr. Thorncrest | Kor | 2 | 1 |
| Madlyn Rhue | June Fleming, Madge | Marla | 2 | 1 |
| Marj Dusay | Andrea Claire Dupre, Nicole Wylie | Kara | 2 | 1 |
| Vic Tayback | Martin Lynch, Parmel | Jojo Krako | 2 | 1 |
| William Windom | Harlan Henderson, Ossie Connors | Commodore Matthew Decker | 2 | 1 |
| Barbara Luna | Elena Kamoku, Yoko | Lt. Marlena Moreau, Mirror Marlena | 3 | 1 |
| Barry Atwater | Lester Workman, Michael Holt | Surak | 3 | 1 |
| Diana Muldaur | Angela Storey, Cathy Wallis | Dr. Anne Mulhall, Dr. Miranda Jones | 2 | 2 |
| France Nuyen | Frances Chai, Iso, Sirone | Elaan | 3 | 1 |
| Jason Evers | Charles Irwin, Lieutenant Dexter, Wallis | Rael | 3 | 1 |
| Sabrina Scharf | Nicole Fleming, Victoria Lochner | Miramanee | 3 | 1 |
| Alfred Ryder | Harry Quon | Prof. Robert Crater | 1 | 1 |
| Frank Gorshin | Stash | Bele | 1 | 1 |
| Ian Wolfe | Mr. Miller | Mr. Atoz, Septimus | 1 | 2 |
| Jeff Corey | Andrew Duncan, Dr. William Hanson | Plasus | 2 | 1 |
| Malachi Throne | Barry Bonamo, Reeves | Commodore Jose I. Mendez | 2 | 2 |
| Ricardo Montalban | Alex Pareno, Tokura | Khan | 2 | 1 |
| Sally Kellerman | Eleanor Kalakua | Dr. Elizabeth Dehner | 1 | 1 |
| Sandra Smith | Bella Morgan, Valerie Michaels | Captain Kirk (in Janice's body), Dr. Janice Lester | 2 | 1 |
| William Shatner | Sam Tolliver | Dr. Janice Lester (in Kirk's body), Mirror Kirk, Negative Captain James T. Kirk | 1 | 3 |
| Bill Zuckert | Daniel Gainham, Judge H. Adamson | Johnny Behan | 2 | 1 |
| Antoinette Bower | Margi Carstairs | Sylvia | 1 | 1 |
| Barbara Anderson | Dorothy Meighan | Lenore Karidian | 1 | 1 |
| Brian Tochi | Joey Lee | Ray | 1 | 1 |
| David Opatoshu | Li Wing | Anan 7 | 1 | 1 |
| Keye Luke | Senator John Oishi | Governor Donald Cory | 1 | 1 |
| Logan Ramsey | Edmund Putney | Claudius | 1 | 1 |
| Nancy Kovack | Dr. Alexandra Kemp | Nona | 1 | 1 |
| Pilar Seurat | Theresa Dietrich | Sybo | 1 | 1 |
| Walt Davis | Killer | Klingon Soldier #1 | 1 | 1 |
| William Schallert | Craig Wilkie | Nilz Baris | 1 | 1 |
| William Smithers | Dr. Warren Parker | Captain R. M. Merik | 1 | 1 |
| Arthur Batanides | Consul | D'Amato | 1 | 1 |
| Gary Lockwood | Kelsey | Lt. Cmdr. Gary Mitchell | 1 | 1 |
| James Daris | Neal Porter | Creature | 1 | 1 |
| Louise Sorel | Diane Foxton | Rayna | 1 | 1 |
| Miko Mayama | Nora Kayama | Tamula | 1 | 1 |
| Phillip Pine | Bajano, Toshi Nomuru | Col. Green | 2 | 1 |
| Anthony Caruso | David Thorpe | Bela Oxmyx | 1 | 1 |
| Charlene Polite | Anna | Vanna | 1 | 1 |
| Frank Atienza | Chinough Olena | Kohm Villager | 1 | 1 |
| Jay Robinson | Ralph Mingo | Petri | 1 | 1 |
| Lou Antonio | David Harper | Lokai | 1 | 1 |
| Michael Ansara | Piro Manoa | Kang | 1 | 1 |
| Vince Howard | Bailiff | Crewman | 1 | 1 |
| Liam Sullivan | Dr. Tolvar | Parmen | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.