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.
A total of 148 episodes were made. Jack Klugman appeared in 147. In the episode Has Anybody Here Seen Quincy? (1977) (season 2, episode 7), Dr. Asten (John S. Ragin) talks to Quincy twice on the phone, but Quincy's voice is not heard and he is not seen on screen. The reason Klugman did not take part in the episode is because he disliked the script written by Michael Sloan and Glen A. Larson for the episode; a body brought into the morgue turns out to still be alive. Klugman thought it laughable that a medical examiner of Quincy's fastidiousness would fail to notice it.