The fourth season of Banshee had to do a lot. First, it had to resolve Job's kidnapping at the end of Season three, and the overall fallout of the botched heist. Carrie is reeling from Gordon's death and almost everything has changed after Lucas' resignation from the sheriff's department. The fourth season premiere jumps ahead almost two years to reveal that Lucas is living off the grid when Brock (who is now the Sheriff) finds Lucas and tells him of a murder that looks like the work of a serial killer. From there, the show becomes a murder mystery trying to locate the serial killer with another main storyline parallel to that one involving Proctor (who is now the Mayor) and the Nazis, including Kurt's brother Calvin, which basically pits the sheriff's department vs. the Nazis vs. Proctor.
For those who get the Blu-Ray set, the A/V quality is again top-notch, as it has been with all of the releases. The extras include episode recaps, deleted scenes, and a couple of Zoomed-In featurettes, commentary tracks on a couple of episodes, and cast retrospectives.
Overall, the season is very good despite having a lot packed into it. The murder mystery is quite good and plays out over the course of multiple episodes. The season continues to employ flashbacks, but this time flashing back just over the course of the 18 months between the end of season three and the beginning of season four. The season brings in a couple of new recurring cast members, first Eliza Dushku (from Buffy, Angel, and Dollhouse), and Fred Weller (from In Plain Sight). The show does a decent job of wrapping up the various storylines. It does keep a bit of mystery as we never do find out Lucas' real name, and the ending played out a bit differently than I thought it would but was still well done. There is, of course, a lot of violence and sex. Although, it was a bit lighter on the sex and nudity this season than in past seasons. Still, it is not remotely suitable for kids. If you liked the prior seasons then you will probably like this one as well. If however, the show never did anything for you before this season, this one is probably not going to convert you. But, if you are looking for a good crime show that has a good blend of action and drama, then this is definitely one to give a chance to. But, you definitely have to watch it from the beginning to really be able to follow the plot lines.