All of Hilarie Burton's Dominatrix clothing were from her actual home wardrobe.
Lucas, a reader of comic books, mentions to Henry about Michael Jordan missing "over 9000" jump shots in his career. "Over 9000" is a common reference to the Japanese manga Dragonball Z.
Henry's true date of birth (September 19, 1779) is revealed in a flashback sequence of this episode. Making him approximately 235 years old.
Schopenhauer, Wittgenstein and Kierkegaard are the philosophers that the dominatrix therapist uses for coding her parients names.