When i saw the title of the thread i instantly thought. Breaking bad. Game of thrones and The walking dead. Looks like you have heard of two of them already. If it is Chemistry sciencey stuff your looking for, the closest to that is Breaking. Breaking bad is about a chemistry teacher who is diagnosed with cancer and decides to team up with an old school student to cook meth. Walters (the chemistry teacher) brother is part of the DEA and he is looking for the cook of the blue meth which gets popular, and of course we all know the cooks are walter and jessie. Lots of close calls and quite a few deaths.
Game of thrones is a great tv show. Its about 7 families (lannisters, starks, tyrells, targarian, greyjoys, and two others. Cant remember the names and i have probably spelt these all wrong lmao) who are all in competition to take over the iron throne. The iron throne is basically where the king of all the kingdoms sits (i think?), so whoever is in control of it basically owns everything lol. Lots of unexpected gory deaths, characters you get to love. Charachters you eill absolutely hate. Its great i strongly recommend it. Oh and i forgot. Lots and lots of s*x.
The walking dead! Quite obvious what it is about but i will go into details. Ok so the main character Is Rick Grimes. He is basically the group leader. So first he starts off alone when the zombie appocolypse happens. He wakes up in a hospital bed and walks around. It is absolutely deserted apart from dead people on the floor and stuff he meets a man and his boy and stays with them for a bit. Like half an episode. He then travels to the main city and ends up being trapped by a bunch of walkers. (Zombies). He gets saved and ends up joining a group of people and basically thats how it goes on. New people join the group. Lots die. Some deaths are pretty disgusting, like Game of thrones and many unexpected people die. The group has to overcome lots of enemies. Not just walkers..... Amazing show.
I hope i have helped you find the tv show you are looking for. I strongly suggest you watch one of these shows