Early in the episode, Charlie Bristow, the security guard hired by Wesley, introduces herself and shares her impressive resume. She claims to have spent 8 years in the SAS, a British special forces unit that inspired the creation of the US's Delta Force. Though the SAS has only been open to female applicants since 2018, it is unclear whether any have actually passed due to the unit's high level of secrecy. Even if Charlie did pass during the first possible intake, it would be impossible for her to have spent a total of 8 years in the Regiment.
At the beginning, Vince's pickup truck is shown with the license plate 2ABM543. This plate also shows up in S5E6 on a car pulled over at the beginning, twice on S5E7 (on Chen's UC car and on a van that Nolan and Juarez pull over), and also on SWAT S6E9 on a car that Hector hides behind during the final shootout.
Early in scene Nolan locks his car, but leaves the drivers side window down.