When Walcott walks into Macy's office at the end, he's listening to "Black Coffee" by Rosemary Clooney- Miguel Ferrer's mother.
Macy asks Walcott if anyone had tried to link the cases and she replies "No, Macy. Everyone's been sitting on their hands waiting for Quincy 2000 to break the case wide open!" Jack Klugman who played the original Quincy M.E. from 1976 to 1983 played the role of Dr. Leo Gelber in the first season of Crossing Jordan.