I'm not sure time wise if this was within the last six months, but a great recent thriller drama that came to mind for me was Save Me. Not sure if it's the type of thing your looking for, but I loved it.
it's finished airing and the entire drama was a perfect 10 from beginning to end. you wont be able to guess what comes next. the thrill was real. the adrenaline rush was so strong my insomnia resurfaced...10/10 would watch again