I love crime/mystery dramas so I will share what I have watched and liked. I don't know if you have preference in Korean or Japanese dramas but there are the best I have watched:
Korean dramas:
* Missing Noir M (2015)
* White Christmas (2011) (its amazing psychological drama)
* Bad Guys (2014)
* The Virus (2013)
* God's Gift - 14 Days (2014) (the twists in the story will keep you on your toes until you solve it)
* Ghost/Phantom (2012)
Japanese dramas:
* Galilleo 1 & 2
* Higashino Keigo Mysteries (2012)
* LIAR GAME 1 & 2 (Its not a crime mystery but the games inside will make your brain spin to find a solution)
* MR.BRAIN (2009)
* MONSTERS (2012)
* Detective Conan: Kudo Shinichi e no Chousenjou (2011)
* Tantei Gakuen Q (2006)
* The Files of Young Kindaichi Neo (2014)
Movies:
* Kindaichi Case Files Gate of Jail Private School Murders (2014)
* Saigo no Yakusoku (2010)
* The Snow White Murder Case (2014)
* Suspect X (2008)
* Midnight F.M.(2010)
* 7 Days (2007)
I hope you like them!
You can watch online at:
www.myasiantv.comwww.gooddrama.net