The Alienist on Netflix is a pretty good show and I absolutely recommend it!
The Alienist is a Netflix original and I believe it was added fairly recently. Season 1 only has 10 episodes but I think it's definitely worth checking out. Though I should clarify that it's not for everyone. It's very dialogue heavy and isn't an action packed show, so if you need a lot of action, this show might not be for you.
What I find really interesting is the main character. Dr Laszlo Kriesler. He's a really compelling and intellectual character. He's made it his life goal to understand why men do such vile and vicious things. He seems more fascinated than horrified by the serial killer he's after. He's seems almost obsessed with trying to understand this killer.
Anyway there's a whole cast of interesting characters in this dark story and I loved it. I really hope it does well and gets a season 2. If you've seen it feel free to share your thoughts about the show. I'd love to discuss it. If you haven't seen it but are curious, I'd be happy to answer any questions without spoiling too much.