Fox's The X-Files and Sleepy Hollow, and ABC's Twin Peaks, are among the best spooky cop TV shows ever made.

Among the best cop shows of all time, you'll find a mix of hugely popular entries that remain on the air to this day ("Law & Order"); those that have ended but remain oft discussed and regularly ...

Sure, "NCIS" has been around forever and perfected the modern police procedural formula, but these five shows have way more going on under the hood.