Opening scene and flashes of "FBI" building show flags with 35 stars.
In the pilot episode, the receptionist at the rescue is seen handing Sue paperwork, along with a red leash and collar to indicate that Levi is a service dog. Except for the episode in which Jack and Sue portray newlyweds to catch a terrorist, Levi is never seen wearing the collar, nor is the leash seen.
In several episodes you can see restaurants only available in
Canada and once a specific Toronto location.
The series is set in Washington DC, however on several occasions you see Toronto cabs in the background (Beck Taxi - Distinct Green & Orange).