The Barking Dog

Dr. Martin Reed, a chemist working for the U.S. government, disappears mysteriously. At the same time, Dr. William Maklin, one of his associates, is killed in a plane crash. Investigating Maklin's death, Hunter discovers that Reed is in hiding and plotting to poison the Southern California water supply and kill two million people if he does not receive a payment of $10,000,000 within 48 hours.