That was the season finale for Season 3. The first two seasons are available on the net. Start at the beginning and you will have a better grasp of what this season finale finished and be ready for Season 4.
As with any series, there are a few “dud” episodes, but not many. Story arcs are long and involved, some are finished, some are not.
For us, POI is “must see” TV.
LSAggie (posting on hubby’s account)
The CBS site requires me to download MPlayer to watch. Is there another option osagebowman?