All 110 actors in both Magnum, P.I. and The Love Boat
110 actors have appeared in both Magnum, P.I. and The Love Boat, across 407 episodes. The most-credited is Phyllis Davis, Alice Cleopatra "Cleo" Mitchell, Magnum's 1940's Secretary, Tiffy in Magnum, P.I. and Evelyn Miller, Gayle Ludwig, Marge Peterson in The Love Boat.
| Actor | In Magnum, P.I. | In The Love Boat | Eps | Eps |
|---|---|---|---|---|
| Phyllis Davis | Alice Cleopatra "Cleo" Mitchell, Magnum's 1940's Secretary, Tiffy | Evelyn Miller, Gayle Ludwig, Marge Peterson | 8 | 4 |
| Jessica Walter | Joan Fulton | Holly Hartman, Marcia Farnsworth, Jocelyn Hyatt Matthews | 1 | 8 |
| Paul Burke | Admiral Hawkes, Admiral Kitchner | Brian Sherwood, Ned Beacham, Walter Baresh | 5 | 3 |
| Carol Channing | Carol Channing | Aunt Sylvia | 1 | 6 |
| Elaine Joyce | Marina Pepesco | Bonnie Lee Boone, Darlene Potter, Dawn Delaney | 1 | 5 |
| Shavar Ross | Bryant Calvin | Bobby Davis | 5 | 1 |
| Ernest Borgnine | Earl "Mr. White Death" Gianelli | Dominic Rosselli, Ernest Borgnine | 1 | 3 |
| Morgan Stevens | Dan Wolf / Driscoll | Roger Wembley, Kurt Duncan | 1 | 3 |
| Vera Miles | Joan Gibson | Arlene Kemper, Bess Hensinger, Eve Springer | 1 | 3 |
| John Hillerman | Father Paddy McGuinness, Don Luis Mongueo, Elmo Ziller | Ed Hartnett, Manfred Benusse | 4 | 3 |
| Alan Hale Jr. | Russell Tate | Gus Dolan, Jack McTigue | 1 | 2 |
| Darren McGavin | "Mad" Buck Gibson | Lawrence Evans | 1 | 2 |
| Fritz Weaver | Captain Cooly | Mr. Weatherby | 2 | 1 |
| Joanna Kerns | Jenny Hunter, Mary Kanfer | Beth Luckner | 2 | 1 |
| Judith Chapman | Louise Jackson, Sarah Clifford/Lisa Page | Nancy Atwell | 2 | 1 |
| Laurette Spang | Marge Atherton | Linda, Melanie Taylor | 1 | 2 |
| Leslie Uggams | Alexis Carter | Callie Reason, Marion Blake | 1 | 2 |
| Noah Beery, Jr. | Floyd Lewellen | Daryl Wilcox, Gordon Layton | 1 | 2 |
| Richard Roundtree | Peter Jordan | Dave Wilbur | 1 | 2 |
| Stella Stevens | Loretta 'Lolly' Zachary van der Post | Kathy Costello, Toni Cooper | 1 | 2 |
| Barbara Rush | Ann Carrington, Phoebe Sullivan | Eleanor Gardiner, Eleanor Gardner | 2 | 2 |
| Devon Ericson | Jennifer Chapman | Ellen Brown | 1 | 1 |
| Eddie Barth | Harry Granger | Joey Weasel Malone | 1 | 1 |
| Erin Gray | Joy "Digger" Doyle | Maggie Cook | 1 | 1 |
| Henry Gibson | Ronald Mills | Henry Beemus | 1 | 1 |
| José Ferrer | Robert Caine | Deke Donner, Simon Beck | 1 | 3 |
| Marcia Strassman | Dr. Karen Harmon | Stephanie Lewis | 1 | 1 |
| Marcia Wallace | Barbara Terranova | Ms. O' Roarke | 1 | 1 |
| Nicholas Hammond | Clark Troubshaw | Paul Stockwood | 1 | 1 |
| Norman Fell | David Albertson | Bill McCoy | 1 | 1 |
| Robert Pine | Lt. Thomas Magnum Sr. | Reverend David Ruland | 1 | 1 |
| Stephanie Faracy | Amy Salyer | Honey Malloy | 1 | 1 |
| Susan Oliver | Laurie Crane | Kay Tindal | 1 | 1 |
| Sylvia Sidney | Elizabeth Barrett | Natalie Corson | 1 | 1 |
| Cesar Romero | Doc Villoroch | Carlos Belmonte, John Drake, John Stockton | 1 | 4 |
| Sal Viscuso | Herbie | Charlie Cole, Doug Ketchum, Mark Carlson | 1 | 4 |
| Celeste Holm | Abigail Baldwin, Carol's Mother | Estelle Castlewood, Florence Flanders | 1 | 2 |
| James Shigeta | Mr. Obotu, Richard Enoka | Bud's Father | 2 | 1 |
| Morgan Fairchild | Catherine Hailey | Jenny Boyer | 1 | 2 |
| Samantha Eggar | Laura Bennett | Mary-Louise Murphy, Meg Chase | 1 | 2 |
| Scatman Crothers | Tickler | Malcolm, Virgil 'Scattergun' Gibson | 1 | 2 |
| Dana Wynter | Olivia Ross, Velma Troubshaw | Lillian Smith, Margo Beacham | 2 | 2 |
| Barry Van Dyke | Duke Davis | Brandon Cobb, Joey Gardiner, Roger DeConte | 1 | 4 |
| Jill St. John | Jan Kona | Claire Dairymple, Laura, Mitzi De Risi | 1 | 4 |
| Carlene Watkins | Officer Gordon | Linda Trent, Rebecca Davis, Susan Russell | 1 | 3 |
| Dick Shawn | Buzz Benoit | Harvey Blanchard, David Jackson | 1 | 3 |
| Eugenia Wright | Snow White | Tina Burnell | 2 | 1 |
| Fay Hauser | Tina Calvin | Laraine Graham | 2 | 1 |
| Frank Converse | Sam Henderson | Bill Thompson | 1 | 1 |
| Jared Martin | Arthur Houston | Jim Tipton, Paul Reese | 1 | 3 |
| Joe Regalbuto | Don Eddie Rice | Herb Hanson / Crazy Joe Flash | 2 | 1 |
| John Ratzenberger | Walt Brewster | Marty Elder | 1 | 1 |
| Kim Richards | Carrie Reardon | Gail / Lilian Gerber | 1 | 1 |
| Lew Ayres | Sidney Dollinger | Carl Hooper | 1 | 1 |
| Lynne Moody | Bebe Kiamonni | Ellen Pozelle | 1 | 1 |
| Mildred Natwick | Madge LaSalle | Beatrice Dale | 1 | 1 |
| Pat Morita | Jack Metro | Mr. Yamashiro, Vincent | 1 | 2 |
| Patrick Macnee | David Worth / Chee / Chinese Doctor | David Blake | 1 | 1 |
| Patty McCormack | Carol Baldwin | Beth Donaldson | 1 | 1 |
| Paul Sand | Denny Prine | Wally Denton | 1 | 1 |
| Rebecca Holden | Laura Frasier | Diane, Mona Forsyte | 1 | 2 |
| Shelley Smith | Melissa Wainwright, Peggy Armbruster | Gwen Hutchins, Phyllis Townsend | 2 | 2 |
| Susan Blanchard | Katherine Magnum | Melanie Tate, Sarah Lambert | 1 | 2 |
| Tim Rossovich | Hank, Nelson | Thomas 'The Mangler' Sharkey | 2 | 1 |
| Denise Nicholas | T.C's Date | Maura Belloque, Jenny Brooks | 1 | 3 |
| Ray Buktenica | Bruce Kunkle | Harold Pack / Jack Honeycutt, Marvin Cooperman, Simon Scott | 1 | 3 |
| W.K. Stratton | Healy, Officer Kelly | Kyle | 3 | 1 |
| Belinda Montgomery | Frannie Huddle | Karen, Valerie Singer | 1 | 2 |
| Eileen Brennan | Brenda Babcock | Helen Foster | 1 | 2 |
| Gary Frank | Jeff Spangler | Dr. Barry Mason | 1 | 2 |
| Kathleen Nolan | Gloria Marston, Myrt Callahan | Lauren Simmons | 2 | 1 |
| Barbara Rhoades | Marcella | Didi Donnelly | 1 | 1 |
| Clive Revill | Inky | Slade Collins | 1 | 1 |
| Gregg Henry | William Keyes | Gregory Steven Leonard | 1 | 1 |
| Hermione Baddeley | Bernice | Kitty Pickrel | 1 | 1 |
| John Bennett Perry | Stephen Parker | George Washburn | 1 | 1 |
| Joshua Bryant | Keeler | Jack Plymouth | 1 | 1 |
| Martha Scott | Jeanie LaSalle | Janet Latham | 1 | 1 |
| Mary Kate McGeehan | Lynn Harbison | Anne Loring | 1 | 1 |
| Sheila Frazier | Sheila Pennington | Joyce Murdock | 1 | 1 |
| William Windom | Captain James T. Lyle | Bill Kelly, Harold Wallingford | 1 | 3 |
| James Staley | Andrew Clifton, the IAD Cop, Steve the Banker | Fred | 2 | 1 |
| Michael Constantine | Judge Hannibal Kearns | Charlie Haskins | 1 | 2 |
| Cesare Danova | President Manuel Ebenez | Fedalio Cevini | 1 | 1 |
| Edward Winter | Dr. Jorgenson | Rod Simpson | 1 | 1 |
| Howard Duff | Captain Thomas Sullivan Magnum I | Glen Leciter | 2 | 1 |
| Maria O'Brien | King Kamehameha Club Manager Applicant | Rita Almerez | 1 | 1 |
| Michael Goodwin | Frank Danton | Kevin Butler | 2 | 1 |
| Nobu McCarthy | Barbara Ikeda | Dr. Chen, Nara Latham | 1 | 2 |
| R.J. Williams | Young Thomas Magnum | Richie Wilson | 1 | 1 |
| Robert Sampson | Desmond Crane | Nelson Finner | 1 | 1 |
| Steven Keats | Clayton | Dwaine Fenley | 1 | 1 |
| Vincent Baggetta | Gary Rankin, the Prosecutor | Frank Vallone, the plumber | 1 | 1 |
| Barry Nelson | William B. Knox | Mac O'Brian | 1 | 1 |
| Carole Cook | Sarah Tate | Phyllis Faraday | 1 | 1 |
| David Spielberg | Dan Morgan / Inspector Vittorio Mono | Marc Mercer | 1 | 1 |
| Dick Butkus | Clarence/Dumbo | Ernie Jordan | 1 | 1 |
| Jennifer Salt | Susan Brandis | Patricia Lucas | 1 | 1 |
| John Zarchen | Farnsworth | Martin | 1 | 1 |
| Peter Isacksen | Jerome "Killer" Stenhauser | L. Courtney Stubing IV | 1 | 1 |
| Casey Sander | Roy | Father | 1 | 1 |
| Henry Jones | The Butler | Frank Jensen | 1 | 1 |
| John Fujioka | Nishimoto | Dr. Lee | 1 | 1 |
| Melora Hardin | Nancy Perkins | Courtney Chenault | 1 | 1 |
| Paul Tinder | Delbert Nolton | Crew Member | 1 | 1 |
| Stephanie Blackmore | Fatman's Widow | Peggy | 1 | 1 |
| Anulka Dziubinska | Zora Korcek | Ginger | 1 | 1 |
| John McCook | Prince Roland Martine | Mark Bridges | 1 | 1 |
| Pamela Jean Bryant | Marge | Sally | 1 | 1 |
| Susan Heldfond | Nina | Toby Chapman | 1 | 1 |
← Magnum, P.I. × The Love Boat
Cast data from TVmaze, licensed CC BY-SA 4.0.