5. Breaking Bad
Most of the credit for the success of Breaking Bad should go to the writers. They did a phenomenal job with complex themes and extremely satisfying conclusion.
6. The Twilight Zone
This is one of those Sci Fi series which goes into the depth of the human psyche. Adding flavours of horror in it worked absolutely fine.
7. Sherlock
Needless to say, if you are a fan of detective series, you cannot get away without watching Sherlock.
8. The Fall
Not many psychological thriller series gets famous. This one however, became so famous that it is considered one of the best series ever.