When Vic Mackey is interrogating Roy Vegan's character William about his boy, at one specific moment you could see camera equipment placed on the right side corner of the room. This might be visible with the wide-screen DVD version.
Mackey's divorce attorney at one point says, "In my experience, nobody goes straight to DEFCON 5 without a reason." DEFCON 5 is normal peacetime operations and the highest alert level is DEFCON 1.