Suggestions for similar addicting TV shows?

I have just finished watching all available seasons of Pretty Little Liars on Netflix (we don't have cable so I haven't seen the newest season yet). I love the suspense and mystery of this series. I also really enjoyed The Secret Circle! I binge-watched both of these shows with my mother..... so please do NOT recommend anything with a lot of foul language or sex scenes. (I'm 25, but I still feel awkward watching vulgar scenes with my mother....and as for foul language, I just don't care for it). Other shows we've enjoyed besides PLL and Secret Circle are: Charmed, Buffy, Gilmore Girls, Switched at Birth. Just curious if there are any really addicting shows on Netflix right now similar to the ones I've mentioned...ones where you want to watch them back-to-back? :) Let me know what you got