This episode draws a thin line of disturbing and grotesque. Definately not for younger viewers. When a troubled younger man from a past life of abuse starts murdering (knifing) people in public places.
However, if you are a die hard fan of the show, that is the kind of episode you love. You can not help but root for the team and hope that they catch him.
The episode gives a history and motive to the crime. This episode was well thought out and well dialogued. It did give me goose bumps all over to think that you could be sitting in a pew and church and you are not even safe.
It doesn't lead to a continuing episode however none the less creative and edge of your seat explosive.