| An experienced South Pacific Sea Dog by the name of Quinton McHale, was commissioned as a Lieutenant Commander into the U.S. Navy Reserve at the start of World War II. McHale was made the Skipper of the Torpedo Patrol (PT) Boat #73 stationed at the U.S. Naval Installation on the island of Taratupa in the Southwest Pacific. The 73 'Family' included, among others, a con man and amateur Magician, a womanizing hunk, a dedicated Family man, a guitar-playing, moonshine-making Tennessee good ol' boy, and even a deserter from the Japanese Navy, who was an excellent cook. |
| Name | Character | Episodes |
|---|---|---|
| Ernest Borgnine | Quinton McHale | 138 |
| Gary Vinson | George Christopher | 138 |
| Tim Conway | Ensign Charles Parker | 138 |
| Gavin MacLeod | Happy | 138 |
| Carl Ballantine | Lester Gruber | 138 |
| Bob Hastings | Lt. Elroy Carpenter | 138 |
| Billy Sands | 'Tinker' Bell | 138 |
| Edson Stroll | Virgil Edwards | 138 |
| Joe Flynn | Captain Wallace B. Binghamton | 138 |
| Roy Roberts | 108 | |
| Herbert Lytton | Admiral Reynolds | 11 |
| Mako | 7 | |
| Bob Hastings | 3 | |
| Andy Romano | 2 | |
| Roy Roberts | Admiral Rogers | 2 |
| Raquel Welch | Lt. Wilson | 1 |
| Walter Brooke | Capt. Harper | 1 |
| Fay DeWitt | Frances | 1 |
| Mike Farrell | The Gunner | 1 |
| Don 'Red' Barry | Capt. Kittridge | 1 |
| Yvonne Craig | 1 | |
| Lloyd Kino | 1 | |
| Read Morgan | The Marine Sergeant | 1 |
| Paul Bryar | Adm. Tucker | 1 |
| Paul Bryar | Admiral Harris | 1 |
| Olan Soule | 1 | |
| Julie Bennett | Nippon Nancy (voice) | 1 |
| Robert Kino | The 2nd Japanese Soldier | 1 |
| Brenda Benet | Karema | 1 |
| Don Kennedy | The 2nd Sailor | 1 |
| Betsy Jones-Moreland | 1 | |
| Arte Johnson | Sweeney | 1 |
| Marvin Kaplan | Kwazniak | 1 |
| Mark Tapscott | Cmdr. Ellis | 1 |
| Ivan Bonar | Major Domo | 1 |
| Gene Tyburn | Pilot No. 2 | 1 |
| Bronwyn FitzSimons | Nurse Loretta | 1 |
| Jerry Dexter | 1 | |
| Paul Smith | Cmdr. Carter | 1 |
| Marian Collier | Peggy Tyler | 1 |
| John Nolan | The 2nd Sailor | 1 |
| Bob Okazaki | 1 | |
| Jean Hale | Ginger | 1 |
| Jean Hale | Mimi St. Clair | 1 |
| Noel Drayton | Lt. Commander Forbes | 1 |