The actor playing Linus Belouzian (Mark Famiglietti) actual birthday 09-26-79 is also the birthday shown on Wu's laptop as the characters criminal history.
Opens with the quote, "One could have called that shape a woman or a boy: for it seemed neither and seemed both." This is from Ovid's Metamorphoses.
Last appearance of Alexis Denisof as Viktor.
Linus and Stacy being two people sharing one body is similar to Ben and Glory in Buffy, another show about monsters and the supernatural. David Greenwalt, co-creator of Grimm, was a writer and director on both Buffy the Vampire Slayer and it's spinoff Angel.
Michael Fisher-Welsh, who portrayed the Doctor, also portrayed the Thoracic Surgeon in "Thanks for the Memories" and "Octopus Head".