I haven't been watching TV series for a long time,however I still remember some great ones,which i have really enjoyed,and which i can recommend to you to watch it people :) I think you will be satisfied.
1 ) The Walking Dead
Im almost sure that most people here know it already,it is about a zombie apocalypse going on Earth-and about the small group of survivors,and their life:running from dead,fighting with alive people for supplies,etc.
2 ) Breaking Bad
The first episode starts with our main hero,an chemistry teacher (Walter White) talking to doctor that he got cancer-and he have not much time left. Walter decided to make metaamphetamine,to help his family survive through all the years later,when Walter life's comes to the end.
3 ) Prison Break
It is about a fraud-brother of main hero got to jail for a murdering someone important-brother of politician,but it turns out that he was innocent,and he was framed by some organization.The younger brother invented a plan to get his brother out of jail.
4 ) True Detective
This programme is about an homocide detective (and his friend) looking for a occultist murderer,which have already killed many innocent persons.Places where he did that,looked like a place where an occultist rituals were made.
5 ) Vikings
It is all about vikings that were living in Norway,how they live,there is also shown an invasion to the England,a really interesting TV serie,i really love it!