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. 

  

This show is strangely tough for Japanese standards.