Isaac falls in love with a girl (Debbie Allen) who is struggling to make a marriage decision about another man; a recent heiress (Maren Jensen of ABC's "Battlestar Galactica'') believes that all men, including her former boyfriend (Dennis Cole), are after her money, and romance between two passengers (Gene Rayburn and Fannie Flagg) is threatened by the woman's snarling little dog, on the ABC Television Network's "The Love Boat," SATURDAY, FEB. 24 (9.00-10.00 pm., EST). While Isaac is befriending Selena Moore (ivis. Allen), traveling alone to consider whether she is prepared for the responsibilities of marriage, he is also falling in love with her in "The Decision," written by Henry Coleman. In "Poor Little Rich Girl," written by Ben Joelson and Art Baer, mechanic Alan Harmon (Cole) can't convince former waitress Suzanna Wells (Ms. Jensen) of his love for her until Capt Stubing suggests a most unusual ploy. In "Love Me, Love My Dog," written by Barry Blitzer, it's smooth sailing romantically for Mason Randolph (Rayburn) until the dog that Mrs. Alicia Finch (Ms. Flagg) has smuggled aboard takes an instant dislike to him.