* ActorAllusion: Lightman says in the episode "Double Blind" that he's partial to Van Gogh. {{Creator/Tim Roth}} played him in Vincent and Theo.
* OutOfOrder: {{Creator/FOX}} aired the entire second season in completely random order.
* SeparatedAtBirthCasting: Hayley [=McFarland=] (Emily) and Jennifer Beals (Zoe) look remarkably similar, especially around the eyes, to the extent that the surprise in Zoe's introductory scene that she is Cal's ex-wife (and Emily's mother) doesn't really work because she looks so much like Emily.