Special Agent Tiffany Wallace says "You know, that whole Nashville thing," referring to the 2020 Christmas Day RV bomb detonated outside the AT&T network facility in Downtown Nashville. That bomber broadcast a computerized voice warning people to evacuate. Although this episode contains a computerized voice message, it was propaganda, not a warning.
Another Wolf Ent. alumni, Kathleen Munroe (Rina Trenholm) has previously appeared on crossover episodes of Chicago P.D. and Chicago Med as well as an episode of Law & Order: SVU.