Hugh Mulzac, a merchant mariner, was a real person in history. The information provided about him was extremely accurate.
As Grandma Moseby pulls items from her purse, this is similar to Disney's Mary Poppins.
Segregation is referenced in this episode as a rare occurrence in a Disney show.
On the chalkboard, before Zack gets a D on his report, says "The Illuminati Revealed" on the bottom left-hand corner.
Grandma Moseby is Phill Lewis in drag.