Undoubtedly, it is an interesting show! My only qualm is that the makers might have borrowed a recurring theme in the plot from a South Korean show, released in 2022, called "Trolley." That show also revolves around the "trolley problem," which deals with the dilemma of whether to sacrifice one person to save a larger number of people.
As soon as Ashutosh Gowariker's character, Admiral Zibran, brought up the theory in a scene, I was reminded of the Korean show. There is no other similarity between Kaala Paani and Trolley, though many of the climactic scenes seem to deal with this theme in some way or the other.
On the whole, the writers and directors of the show have put together a thrilling and exciting story that is relevant in present times.
I enjoyed watching the backstories and character development of Chiru, Ritu, Ketan, and Jyotsna. Not to give away too much, but the deaths of some of the main characters took me by surprise.
I find the character of Ketan Kamat, played by Amey Wagh, the most interesting because he is one of those people who doesn't see things in black and white. His character adapts to the situation that he is in, which might lead him down a good or bad path. I guess he fits the adage of "survival of the fittest," which is another recurring theme in the show.
Would I recommend this show? Definitely! I binge-watched it in three days despite a bad internet connection. I promise you'll be on the edge of your seat as this roller-coaster of emotions unfolds.
P.S. As for the trolley problem, I don't think I would sacrifice one person to save many. I would let fate decide.