| Name | Character | Episodes |
|---|---|---|
| Jonathan Harris | 42 | |
| Don Adams | 42 | |
| Gary Crosby | 42 | |
| Amzie Strickland | 3 | |
| Howard Wendell | 2 | |
| Arthur Batanides | 2 | |
| Ruta Lee | 1 | |
| Karl Swenson | 1 | |
| Danny Thomas | 1 | |
| Stanley Adams | 1 | |
| Barbara Stuart | 1 | |
| Marlyn Mason | 1 | |
| Charles Lane | 1 | |
| James Frawley | 1 | |
| Sue Randall | 1 | |
| Douglas Fowley | 1 | |
| Simon Oakland | 1 | |
| Sue Ane Langdon | 1 | |
| Mike Mazurki | 1 | |
| Nestor Paiva | 1 |