Capt. Stubing (
Gavin MacLeod) mentors Captain Donahue (
McLean Stevenson), whom Gopher (
Fred Grandy) thinks is out to take command of the Pacific Princess. Ben Phillips (
Frank Bonner) and Henry Greg (
Arte Johnson) seem to be aggressively competing for the affections of Mary Frances Bellflower (
Shelley Fabares), who claims that they're only after her foxhound. Doc's (
Bernie Kopell) longtime friend, Erica Dupont (
Jenilee Harrison), works on the cruise to help her mother pay for her wedding to wealthy fiancé Robert Wallingford (
Stephen Shortridge), who, along with his socially snobbish parents Harold and Margaret (
William Windom and
Jane Wyatt), thinks she's wealthy, as well. But then Harold and Margaret turn up on the same cruise, leading Erica to try to hide from them.
—Maisie Fleckum