| Name | Character | Episodes |
|---|---|---|
| Cyril Delevanti | Lucius Coin | 26 |
| Jeff Richards | Jefferson Drum | 26 |
| Andrew Duggan | Charles McGowan | 1 |
| L.Q. Jones | Burdette | 1 |
| Virginia Gregg | Louise Hammond | 1 |
| Dan Blocker | Craig | 1 |
| Sue George | Kate Sparks | 1 |
| Robert Vaughn | Shelly Poe | 1 |
| Rita Lynn | Birdy Thornton | 1 |
| Strother Martin | Pete Henke | 1 |
| John Larch | John Larkin | 1 |
| Rand Brooks | Ray Comstock | 1 |
| Russell Thorson | Bert Temple | 1 |
| R.G. Armstrong | Kreiger | 1 |
| Ted de Corsia | Jim | 1 |
| Douglas Fowley | Wooley | 1 |
| John Harmon | 1 | |
| Kenneth Tobey | John Wallach | 1 |
| Denver Pyle | Bart Resdake | 1 |
| Mike Connors | Simon Pitt | 1 |
| Philip Ahn | Charles Wong | 1 |
| Joe Turkel | Tom | 1 |
| Kathryn Card | Evie Barnes | 1 |
| Patrice Wymore | Goldie | 1 |
| Robert Bray | Jack Page | 1 |
| Russell Johnson | The Sundown Kid | 1 |
| Chuck Courtney | Jimmy | 1 |
| Bruce Gordon | Juan Cavanaugh | 1 |
| Richard Reeves | Paul Meeker | 1 |
| Jim Bannon | Tay Beloin | 1 |
| Paul Sorensen | Benson | 1 |
| Gardner McKay | Simon Easton | 1 |
| Alexander Campbell | Judge | 1 |