Guest Stars Patti Davis as Brenda Gloria DeHaven as Mary Halbert Donald O'Connor as Leo Halbert Thom Bray as Lowell Mandell Nancy Dussault as Dr. Dorothee Davis Co Starring Teri Hatcher as Amy (Love Boat Mermaid) Debbie Bartlett as Susie (Love Boat Mermaid) Tori Brenno as Maria (Love Boat Mermaid) Andrea Moen as Starlight (Love Boat Mermaid) Nanci Hammond as Jane (Love Boat Mermaid) Debra Johnson as Patti (Love Boat Mermaid) Macarena as Sheila (Love Boat Mermaid) Beth Myatt as Mary Beth (Love Boat Mermaid) Uncredited Vincent Di Paolo as Passenger
