Giving This 10 stars. Not that it really deservers a 10 star rating but it's currently So low because of the 1 star spam done by Nonsensical fans of a superstar has really affected the overall ratings.
As far as the Series goes.
It's Not just a Average Byomkesh season. I enjoyed all the Seasons of Byomkesh, but none of them were cinematically remarkable as such but with Byomkesh O Pinjrapole, came a Remarkable change to the Making and feel of the series, while the last was truly cinematic, This one deals with The Dramatic side of Byomkesh and his life which has never been done before in this way. Really Outshines The other Works done on the character of Byomkesh, The Drama sequences are well Staged. The Canvas looks larger and Grander than other usual byomkesh seasons , if not all other usual Hoichoi series-es. The Suspence Is not Shown a really gritty thriller manner, but still the Thriller element stays, the investigation stays relative. The historical flashbacks are done great. The cast's performance is stellar. Anirban, Oh my love, Is magnificent. Director Conveys his political thoughts in A really Heart touching way.
But still The biggest Achievement this series made was it's inter-universe byomkesh-esque reference.
Summing up, it was "OTI UTTAM"