S4, E19: When a woman dies from a form of dioxin poisoning, Detectives Goren and Eames investigate a list of likely suspects, including the woman's husband, a busy dentist (Bronson Pinchot).
Celia Weston
Leslie Hendrix
Elizabeth Hobgood
Nathan Dean
Bronson Pinchot
Stephen Barker Turner
Cullen O. Johnson
Karen Shallo
John Braden
Billy Merritt
Evan Neumann