After Sherlock series, there is a new series named Elementary. Yes, with Watson and Sherlock. Again? Yes, again. And you are watching it? Sure, it is different.
And now, spoilers. I promise not to tell the story, just how the series work. Sherlock is a guy that worked in London as a consultant for Scotland Yard. He had some issues with drugs, and got interned. In the last day of internship, he escaped, just to tell there are flaws in the security system. He got a companion to help him not to get into drugs again. The companion is Watson, Joan Watson, a cute girl.
The cases analyzed by Sherlock are not related to the original books. That is great. Gives liberty, and doesn’t go for histories we all know by now. The only similarities are having Sherlock, one (well, female) Watson, that is also a doctor, and Sherlock being able to deduce things. Promises.