Carol (Julianna Margulies) takes a more than professional interest in Tatiana (Milana Vayntrub), a six-year-old Russian girl with AIDS who has been adopted -- and then abandoned -- by an American family. Overachiever Deb (Ming-Na) accidentally ingests some candy-coated LSD. And despite their volatile professional differences, Kayson (Sam Anderson) asks Lewis (Sherry Stringfield) out for a special Valentine's Day dinner. ~ Hal Erickson, Rovi