Quincy's assistant Sam (Robert Ito) has come up with a revolutionary new process to determine the identity of sex criminals by using dental comparisons. Trouble is, the medical establishment refuses to accept Sam's methods, even after he clears an ex-con of a rape charge. When that same man ends up as the chief suspect in a subsequent rape-murder, it looks as if Sam's theories are worthless--but Quincy (Jack Klugman) has faith in his colleague, and he intends to use his own forensic expertise to prove that Sam was right all along. ~ Hal Erickson, Rovi