The apartment seen in this would be reused again in the subsequent episode, "Tissue of Truth".
Ben Frank (Goodman) played the part as Mr. Schroeder in Quincy M.E. season 2, episode 12 called "Valleyview".
During the opening when Quincy is addressing the new officers no words are spoken. This was a change made starting with the third season.
When Lt. Monaghan and Quincy go look for Tom-Tom, they talk to a guy eating cereal. He's played by Creed Bratton, a former member of the pop group The Grassroots. He's best remembered playing one of the workers in The Office.