Having a bad day? The unsub on next week's new Criminal Minds has a cure for that. But you probably won't like it, as teased in the following preview.

Looking ahead to "Closing Time," fans can expect to see bodies discovered in lifeguard towers along Southern California beaches. They can also expect to see JJ kick some serious behind.

Watch now to get an idea of the sort of villain she'll be up against and then prepare for this agent to physically combat an evil doer in very close proximity on the episode:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.