It was claimed at Comic Con that actual descendants of the Brothers Grimm reside in Portland. However there are no descendants of the brothers who complied the fairytales, so the fan was mistaken or lying. Many people want to believe they are descended from the Grimm brothers, and the genealogists give the same answer - the Grimm brother have no living descendants, Jacob had no children, and Wilhelm had no grandchildren, so their line ended there. So anyone who can actually trace their family back to a family called Grimm can only be (at best) a descendant of one of the brothers siblings. The surname Grimm does not mean someone is related to the Brothers Grimm; it was hardly a unique surname.

Sgts Wu (Reggie Lee) and Franco (Robert Blanche) are often seen patrolling together. While this is an efficient way to give Franco more screen time, sgts would never patrol together. Sgts, when out on patrol, ride with less experienced officers, usually rookies.

The second season finale has a note from the writers that says, "To be continued. Oh, come on. You knew this was coming."

Featured in Face Off: Scene of the Crime (2012)