Lance Henriksen - lead actor in the TV Series Millennium (1996), to which "Hannibal" is a spiritual successor - guest stars in Hannibal: Trou Normand (2013) (Episode #1.9). He ends the scene double-tapping his chair, with a sound effect lifted from the Millennium opening theme.
This is my design.
Throughout the series, Will doesn't exhibit proper lab procedure. In an autopsy suite, if you're going to be near the bodies, gown, apron, gloves booties and goggles/face screen are required as personal protection. Will wears none of these.
US TV network versions aired censored versions of some episodes (removing, for example, rear nudity, paintings showing nude figures and some scenes of violence) with a TV-14 rating. These cut versions were released on Blu-ray in the UK, many of which received the more appropriate 18 rating from the BBFC. However, the American Blu-ray editions of the affected episodes are unrated and billed as Producer's Cuts, which restore the previously censored footage.