The very best police procedural shows on television, ranked from best to worst. What is it about a group of detectives that can carry a series for years and years? Some of the longest running drama shows have been police procedurals, including the original "Law & Order," which ran for 22 seasons, and "Dragnet," which aired 450 episodes. This list of the greatest police procedural shows also includes pictures from the shows when available. Popular police procedural TV shows have been a staple of television for years, so there's often debate about which is the most entertaining in the genre. While older whodunit shows like "Murder, She Wrote" have a bit of whimsical comedy in each episode, grittier versions like "SVU" are darker with gritty grimes. What is your favorite police procedural show? Don't let your favorite cop dramas and detective series get to the bottom of the list. Be sure to vote them up so they have the chance to reach the top spot. The list of police procedural television shows below includes information like the program's cast, creator, and premiere date when available. With shows ranging from "Criminal Minds" to "Dexter," this is a great starting point for a list of your favorites.What do you think are the best police procedurals? What are your favorite current cop shows?