Season Five of Quincy, M.E. begins with a typically perplexing case for police medical examiner Quincy (Jack Klugman). Performing an autopsy on a teenage girl, Quincy finds that the girl succumbed to a disease more commonly found in old people. After the victim's boyfriend dies in a similar fashion, Quincy determines that both were heavy drug users--and that the marijuana they'd been smoking had been treated with chemical designed to stimulate plant growth (the resemblance to the controversial defoliant Paraquat was clearly not coincidental). Determined to prevent any further damge, Quincy goes after Ralph Peters (Gary Wood), publisher of the magazine which advertised the deadly stimulant. ~ Hal Erickson, Rovi