DIOXIN POISONING OF DENTIST'S WIFE HAS DETECTIVES CHARTING PLENTY OF SUSPECTS -- BRONSON PINCHOT GUEST STARS -- After a busy dentist's (guest star Bronson Pinchot, "Perfect Strangers") wife dies from a form of dioxin poisoning, Detectives Goren (Vincent D'Onofrio) and Eames (Kathryn Erbe) ponder a likely set of suspects: the jealous doctor, the victim's possible online lover and a tight group of weekly trivia players. They also focus on who could have obtained the poison but their crucial clue is jealousy -- which might begin with a dead woman.