| Name | Character | Episodes |
|---|---|---|
| Walter Matthau | Lex Rogers | 26 |
| Henry Brandon | 2 | |
| Gene Hackman | 1 | |
| Adam West | 1 | |
| Ruta Lee | 1 | |
| Jason Evers | 1 | |
| Tim O'Connor | 1 | |
| Ralph Meeker | 1 | |
| Vincent Gardenia | 1 | |
| Robert Reed | 1 | |
| Stanley Adams | 1 | |
| Steve Brodie | 1 | |
| Michael Conrad | 1 | |
| Woodrow Parfrey | 1 | |
| Joe Turkel | 1 | |
| Jean Byron | 1 | |
| Lew Gallo | 1 | |
| Betty Garde | 1 | |
| David White | 1 | |
| Richard Benedict | 1 | |
| Frank Albertson | 1 | |
| Dehl Berti | 1 | |
| Bernard Fein | 1 | |
| David Clarke | 1 |