Justified is based on a short story by the late great writer Elmore Leonard and created by Graham Yost. Leonard's writing has a fondness for US Marshals and Yost has transferred this to the screen. Yost even managed to bring some characters from prior adaptations of Leonard's work in previous seasons of Justified. Yost keeps the series fresh by bringing in new bad guys for Marshall Raylan Givens (Timothy Oliphant) to deal with while adding depth to his recurring nemesis Boyd Crowder (Walton Groggins).
In season 4 Yost instead goes back to the past to solve the original events that shaped crime and family histories in this Eastern Kentucky county. As good as this plot works, this season gets hijacked by funny man Patton Oswalt who plays Constable Bob. Oswalt is short in stature but long on acting ability. Constable Bob gets pushed around, ignored, and made fun of (behind his back and to his face). When the chips are down, Constable Bob stands tall and doesn't give an inch. Lets all hope Constable Bob becomes a regular cast member.
Best season yet of Justified, a must own season!