Which TV-series to you recommend for binge-watching this summer?

Summer is here, and I'm looking for a nice TV-series to watch when it's too hot to stay outside. So, please give me your best suggestions. I'm pretty much open for any genre, as long as the TV-show itself has a high quality, and is either funny or interesting to watch.

And please write a few sentences about why you recommend it, and what it's about, because just namedropping something does not really help at all.