This drama is great; as I haven't heard much about it, it must have been a sleeper. In this episode, an egotistical scientist is under CRISIS protection but is he worth protecting? 

This particular episode took me by surprise and I always enjoy a good 'who-done-it' or a twist toward the end. Episode 4 did not disappoint. INomaguchi Toru finally had time to shine here and I loved it. Don't get me wrong, Hidetoshi and Shun are capital, but it's good to see development from the minor characters.

Keep watching.