The eight-episode third season of The Sinner aired during the spring of 2020. It again has a completely new storyline and a mostly new cast. The only character carried over from seasons 1 and 2 is Harry Ambrose (played by Bill Pullman). The rest of the season 3 cast members include Matt Bomer, Parisa Fitz-Henley, Eddie Martinez, and Chris Messina. This season diverges from the format of the prior seasons in that we know a lot more about the person under investigation relatively early in the season. Matt Bomer plays Jamie Burns, a high school teacher and new father who has been arrested for murder. Since the writers did not hide the ball as much this season, there is no single "big" reveal at the very end of the season as there was in seasons 1 and 2. That said, the storyline is good, and I think it was wise not to have this season be a carbon copy of the format of the other two. The acting was great, and the writing/storyline was good, but not as good as the first season or even the second season.
The DVD set is a two-disc MOD DVD set. That means there are no extra or bonus features. And, unlike seasons 1 and 2, it was not released individually on Blu-Ray (but it is included in the complete series Blu-Ray set that was released after the series ended with season 4). As physical media slowly goes extinct, TV series are taking the brunt of that, with fewer of them being released even on DVD, and only a very select few being released on Blu-Ray. This is a very bare-bones MOD DVD with no captions and no extras. You just get the eight episodes spread over two discs. So, I think most people who will get this will be those who are just wanting to keep their collection complete. But, if you only get physical discs if there are a lot of extras, then you will just want to stick to streaming this one.