The opening theme song is different in this episode than the rest of the episodes with an additional verse in the middle.
The scene when Will goes to the piano and plays Fur Elise was not scripted. Will Smith improvised it; they left it in.
Will wears the same outfit he wears in the opening credits.
According to the retrospective included as an extra feature on the first season box set, Vivian Banks' name was to be Wendy Banks. However, director Debbie Allen felt Vivian would be a better name and the producers loved it right away.
Geoffrey insists on calling Will by his "proper name" and addresses him as Master William. In truth, Will Smith's real name is Willard, not William.