Quincy's first name was never revealed during the series. However, in one episode, one of his business cards was briefly seen and read "Dr. R. Quincy."
The regulations of the day prevented the producers from showing Quincy's autopsies on screen. The viewer had to rely on Quincy's description of what was going on. These regulations have now been lifted and corpses can be seen on screen in modern police procedurals.
Jack Klugman was part-owner of a horse named Jaklin Klugman, which finished third in the 1980 Kentucky Derby. The horse was named Jaklin by accident (it was a colt), and there is a picture of him hanging in Quincy's houseboat in some of the show's later shows.
Quincy served in the U.S. Navy during the Korean War.