This is the second part of a cross-over episode with Law & Order: Special Victims Unit (1999). This episode follows directly from Law & Order: Special Victims Unit (1999) season 17 episode 14, Nationwide Manhunt (2016).
In addition to the crossover with "SVU", Brian Tee crosses over as Dr. Ethan Choi from Chicago Med (2015).
Also, in addition to the crossover with "SVU", Eamonn Walker crosses over as Chief Wallace Boden from Chicago Fire (2012).
The badge Yates flashes at the truck stop is the shield that belonged to the New York State Trooper he raped and murdered near the Canadian border in Nationwide Manhunt (2016).