Teaser: Valentine's day gifts and a broken heart among Jesse, Becky, and the twins. Main Synopsis: As Valentine's day approaches, Becky thinks Jesse has lost his romantic spark, and that she and Jesse won't have a good 4th anniversary, until Jesse surprises her with a hot air balloon ride and a picnic. Michelle and Teddy's friendship fizzles when they try to be boyfriend and girlfriend, so they decide that their friendship should go back to the way it was instead of being boyfriend and girlfriend. Joey has a secret admirer, and Joey thinks it's Mrs. Carruthers, who has always had a thing for Joey, but the secret admirer turns out to be Ms. Ullman, Michelle's teacher.

Born joined at the pelvis, Siamese twins Dao and Duan were brought to the United States from Thailand to assess their chances for being separated surgically. NOVA covers the intricate planning and protracted operations that eventually made the two girls into two distinct individuals.

Frasier agrees to write an introduction to a new book by a pop psychologist. After reading the book, Frasier realizes he can't endorse it, but he's so attracted to Dr. Honey he can't find a way to turn her down.