Debbie's estranged wild child mother (guest star Rhea Perlman) invites the Weavers to come to her timeshare in San Diego and meet her newly adopted son - he's 10. Debbie agrees to the trip provided that Larry & Jackie come too as a buffer. Meanwhile, Marty tries to cure Abby of her fear of the ocean.
Marty and Debbie are feeling like they are in a rut, so Marty plans a date night, but it turns out not exactly as Debbie envisioned it. Meanwhile, Dick falls madly in love with the new babysitter.