ER: Be Still My Heart (2000)

In the first episode of a two-part story, Valentine's Day has a strange effect on Greene's (Anthony Edwards) cantankerous dad (John Cullum) and Corday's (Alex Kingston) judgmental mom (Judy Parfitt), who find themselves attracted to one another. Back at the ER, a private quarrel between Chen (Ming-Na) and Malucci (Erik Palladino) may have adverse consequences on a patient (Lenny Wolpe). A grim Kovac (Goran Visnjic) must tell two youngsters that both of their parents have been killed. Abby (Maura Tierney) treats one of Carter's patients. And Carter (Noah Wyle) brusquely brushes off Lucy (Kellie Martin) when she asks his help in dealing with a patient named Sobricki (David Krumholtz), whose "headache" may be linked to a more serious mental illness. The episode ends on a sudden and shocking note of tragedy. ~ Hal Erickson, Rovi