The new drone model flown is the TK-421. This is also the stereo upgrade modification offered in Boogie Nights (1997) and a radio call-sign used in Star Wars: Episode IV - A New Hope (1977).
Guest star Deron J. Powell has a recurring role on another Chicago-based series, Chicago Med (2015), a spin-off of Chicago Fire (2012) and Chicago P.D. (2014).