This is the first instance of Reid wearing a revolver as his service weapon instead of an FBI issued Glock. It shows how Reid is far different than the other members of the BAU. This wasn't the first time Reid used a revolver. In season 2's Revelations (2007), Reid shot the unsub after being held hostage. In season 3's Penelope (2007), Morgan said "Who the hell uses a Revolver?"
There is no Lower Canaan, OH. However, there are four Canaan Townships and all of them are two to three hours away from Cincinnati.
Patrick St. Esprit co stars with Shemar Moore on SWAT