I couldn't point any fault out of this season. It was intriguing, suspenseful, flawless and a treat to watch. The direction was magnificent. The cast was incomparable, what a fantastic selection of artists. Nothing to say more about Anirban, he's the only shining star of the Bengali theater and movies as well. Probably the best suited actor who played Byomkesh. The man who played Ravi Barma (I don't know his name, beg pardon) was outstanding. Deb Sankar Halder once again showed his brilliant acting skills. Darshana Banik in the rope of Heena was appreciable.
The background score was so to the point. The dialogue writing was carefully taken care of. The screenplay, cinematography and scriptwriting was reliable.
The best season of Byomkesh. (I am writing it after watching all the seasons until 8)