All 52 actors in both Fantasy Island and Star Trek
52 actors have appeared in both Fantasy Island and Star Trek, across 233 episodes. The most-credited is James Doohan, Governor Gaspar d'Annard in Fantasy Island and Lt. Cmdr. Montgomery "Scotty" Scott, Mirror Scotty, Sargon in Star Trek.
| Actor | In Fantasy Island | In Star Trek | Eps | Eps |
|---|---|---|---|---|
| James Doohan | Governor Gaspar d'Annard | Lt. Cmdr. Montgomery "Scotty" Scott, Mirror Scotty, Sargon | 1 | 64 |
| Morgan Woodward | Marshal Victor Grennan, Nick Hall, Tribal Elder | Captain Ronald "Ron" Tracey, Dr. Simon Van Gelder | 4 | 2 |
| Vic Tayback | Chet Nolan, George Walters, Melvyn Mews | Jojo Krako | 4 | 1 |
| Skip Homeier | Jim Heston, Mike Thurwood | Melakon, Sevrin | 2 | 2 |
| John Fiedler | "Ace" Smith, Mortimer Fox | Commissioner Hengist | 2 | 1 |
| Julie Newmar | Doralee | Eleen | 1 | 1 |
| Lee Meriwether | Leslie Darnell | Losira | 1 | 1 |
| Sherry Jackson | Monica Jensen | Andrea | 1 | 1 |
| France Nuyen | Anna, Kito, Mara | Elaan | 4 | 1 |
| Diana Muldaur | Mrs. Castle | Dr. Anne Mulhall, Dr. Miranda Jones | 1 | 2 |
| Barbara Baldavin | Selma Block | Angela, Lt. Lisa | 1 | 3 |
| Barbara Luna | Colonel Eva Maldonado, Mary, Princess Rima | Lt. Marlena Moreau, Mirror Marlena | 3 | 1 |
| Joan Collins | Lucy Atwell | Sister Edith Keeler | 1 | 1 |
| Kim Darby | Rebecca Walters | Miri | 1 | 1 |
| Yvonne Craig | Cindy | Marta | 1 | 1 |
| Sid Haig | Hakeem, Harlan, Otto | First Lawgiver | 4 | 1 |
| Elinor Donahue | Blanche Barrens, Madge Nolan, Mrs. Marson | Commissioner Nancy Hedford | 3 | 1 |
| Charles Dierkop | Harry "Weasel" Forbes, Vinnie Avalon | Morla | 2 | 1 |
| Jane Wyatt | Martha Wilson, Mildred Grayson | Amanda | 2 | 1 |
| Jeff Corey | Tibur | Plasus | 1 | 1 |
| Madlyn Rhue | Lillie Langtry | Marla | 1 | 1 |
| Michael Ansara | Marco, Pharaoh Ptolemy | Kang | 2 | 1 |
| Charles Picerni | Dekker's Henchman, Donovan, the Burly Man | Klingon | 4 | 1 |
| Arnold Moss | Sheikh | Karidian | 1 | 1 |
| Fred Williamson | Jackson Malone | Anka | 1 | 1 |
| Glenn Corbett | Buzz Nolan | Zefram Cochrane | 1 | 1 |
| Janet MacLachlan | Dena Leigh | Lt. Charlene Masters | 1 | 1 |
| Jason Evers | Ben | Rael | 1 | 1 |
| Jason Wingreen | Doctor | Dr. Linke | 1 | 1 |
| Joseph Ruskin | Killer | Galt | 1 | 1 |
| Ron Soble | Tom Larson | Wyatt Earp | 1 | 1 |
| Harv Selsby | Reporter, Vince Gregory | Guard | 3 | 1 |
| Byron Morrow | Mr. Dow | Admiral Komack, Admiral Westervliet | 1 | 2 |
| Charles Macaulay | Dwight | Landru, Prefect Jaris | 1 | 2 |
| Kathie Browne | Helena Stewart | Deela | 1 | 1 |
| Rex Holman | Jimmy | Morgan Earp | 1 | 1 |
| Steve Sandor | Palmer | Lars | 1 | 1 |
| Mickey Morton | Curly, the Bartender | Kloog | 2 | 1 |
| Anthony Caruso | Big Al | Bela Oxmyx | 1 | 1 |
| David Opatoshu | Abdul Kameel | Anan 7 | 1 | 1 |
| Peter Brocco | the Servant | Claymare | 1 | 1 |
| Roy Jenson | Snuffy Harris | Cloud William | 1 | 1 |
| Ted Gehring | Mel Gordon | Second Policeman | 1 | 1 |
| William Windom | Bill Ackland | Commodore Matthew Decker | 1 | 1 |
| Julie Cobb | Florence Stouton | Yeoman | 1 | 1 |
| Reggie Nalder | DuPrez | Shras | 1 | 1 |
| Emily Banks | Linda Smith | Yeoman Tonia Barrows | 1 | 1 |
| Robert Brown | Lt. Fasbin | Alternative Lazarus, Lazarus | 1 | 1 |
| Tony Young | Joe Houston | Kryton | 1 | 1 |
| Vince Howard | the Teller | Crewman | 1 | 1 |
| Brioni Farrell | Cleopatra | Tula | 1 | 1 |
| Gilbert Green | Mr. Hayden | S.S. Major | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.