The commentary reveals that the different colors character's eyes turn when they touch the Apple corresponds to one of the Seven Deadly Sins.
Rebecca Romijn came up with the idea that the Library Annex would keep resetting Baird's desk with Flynn's things. The showrunners liked the idea so much they made the constant resetting into a subtly integral part of Baird's season one arch.
A drake is a wingless dragon; most Eastern dragons have no wings.
Lamia was intended to return for season 2, but Lesley-Ann Brandt won roles on two other projects and her schedule was unable to accommodate the role.
Dabra, representative of the Jinn, presents Jones with a calling card shaped like a genie's lamp.