Guest stars include Georgia Engel as a stowaway, Gary Frank and Melanie Mayron as a pair of tremulous honeymooners, Stella Stevens and Pat Harrington as an eternally bickering married couple, and Audra Lindley and Phil Silvers as, respectively, an outspoken middle-aged lady and a woebegone widower.
| Actor | Role |
|---|---|
 Gavin MacLeodCapt. Merrill Stubing | Capt. Merrill Stubing |
 Bernie KopellDr. Adam Bricker | Dr. Adam Bricker |
 Fred GrandyShip's Purser 'Gopher' Smith | Ship's Purser 'Gopher' Smith |
 Ted LangeBartender Isaac Washington | Bartender Isaac Washington |
 Lauren TewesCruise Director Julie McCoy | Cruise Director Julie McCoy |
 Georgia EngelCleo Bagby | Cleo Bagby |
 Gary FrankStanley Adams | Stanley Adams |
 Pat Harrington Jr.Ernie Klopman | Ernie Klopman |
 Audra LindleyMae Allen | Mae Allen |
 Melanie MayronJoyce Adams | Joyce Adams |
 Phil SilversMorris Beckman | Morris Beckman |
 Stella StevensLeonora Klopman | Leonora Klopman |
 William BassettJosh | Josh |
| PPaula VictorPaula | Paula |