When Harry and Nikki enter Leo's office at the start of "The Prodigal" we catch a glimpse of a reproduction of the famous Rembrandt painting "The Anatomy Lesson of Dr. Nicolaes Tulp" foreshadowing the Dutch angle of this episode.
The young Jacob van Buren, in the flashback of the game of hide and seek, speaks a heavily accented non native Dutch betraying the young actor's English origin.