At the crime scene, when Castle sees the victim impaled on a piece of art, he comments "Looks like someone gave him liberty and gave him death." He is referencing "Give me liberty, or give me death!", Patrick Henry's famous quotation from his 1775 speech to the Virginia Convention proposing to arm the Virginia militia for service in the Revolutionary War.
Despite being credited, Molly C. Quinn does not appear in the episode. This is only the second episode in the show's four season run that she has not appeared, the first was To Love and Die in L.A. (2011).
Castle actor Nathan Fillion and episode guest star Jessica Tuck had both been series regulars on the soap opera One Life to Live. Also, Fillion and Tuck have both been regulars on shows about young blonde women in love with vampires: Fillion on Buffy the Vampire Slayer and Tuck on True Blood.
Nathan Fillion and guest star Kristin Lehman co-starred in "Drive" together just before Nathan Fillion won the starring role in "Castle".
Guest actor Jessica Tuck played Nathan Fillion's half-sister Megan Gordon on "One Life to Live "