| Special Guest Stars |
| •Bernie Kopell | played | Doctor Adam Bricker | Recurring (first appearance) |
| •Fred Grandy | played | Burl 'Gopher' Smith | Recurring (first appearance) |
| •Gavin MacLeod | played | Captain Merrill Stubing | Recurring (first appearance) |
| •Lauren Tewes | played | Cruise Director Julie McCoy | Recurring (first appearance) |
| •Ted Lange | played | Bartender Isaac Washington | Recurring (first appearance) |
| Guest Stars |
| •Barry Sullivan | played | Unknown | Recurring (first appearance) |
| •Bert Convy | played | Paul Hollister | Recurring (first appearance) |
| •Bo Hopkins (1) | played | Unknown | Recurring (first appearance) |
| •Dick Sargent | played | James Avery | Recurring (4th appearance) |
| •Judy Landers | played | Blonde | Recurring (second appearance) |
| •Lee Travis | played | Unknown | Recurring (4th appearance) |
| •Louie Elias | played | Stack | Recurring (third appearance) |
| •Read Morgan | played | Kadin | Recurring (second appearance) |
| •Sandy McPeak | played | Elenor Case | Recurring (first appearance) |
