Ten previously unaired episodes were added during its syndicated run. Two are from season five, and are consecutive, and eight are from season six. Season five's two episodes are: The Dinner (1989) and The Attic (1989). Season six's eight episodes are: Love Fest (1990), Donuts (1990), Runaways (1990), The Pageant (1990), The Baby (1990), Bad Marsha (1990), Home (1990) and Mumsy (1990).
While doing the series, Bob Uecker continued his work as a full time broadcaster for the Milwaukee Brewers. As a result, filming of episodes was scheduled to accommodate Uecker's broadcasting responsibilities.
Mr. Belvedere was the first prime time sitcom to feature a character with AIDS. In the season two episode, Wesley's Friend (1986), that aired on January 31, 1986, a classmate of Wesley's is removed from school after it becomes known that he contracted AIDS from a blood transfusion. The episode was similar to that of Ryan White, the Indiana teenager who successfully sued his school after being expelled when he contracted AIDS from a blood transfusion. ABC was initially reluctant to air the episode, but Christopher Hewitt insisted on it.
The 1985 series was the fourth attempt to adapt the 1947 novel Belvedere by Gwen Davenport and subsequent film series starring Clifton Webb for television. In 1956, a pilot was produced but was rejected by the networks. In 1959, a second pilot starring Hans Conried was also rejected. In 1965, a third pilot starring Victor Buono also failed to sell.
In the pilot episode, George Owens' occupation is identified as that of a construction worker. In subsequent episodes, the character's occupation was changed to a newspaper sports reporter and, over the course of the series, a television sportscaster. The change was likely made to reflect Bob Uecker's real life career as a sportscaster that audiences largely associated him with.