Mark, Teddy, Callie and Arizona help Sloan deliver her baby; the doctors treat a crab boat captain who was stabbed with a giant shark hook.
The government is shut down and the parks are closed, but Leslie tries to skirt the rules to hold a children's concert in the vacant lot. Meanwhile, will April's jealousy keep her from getting together with Andy?
The BAU team is following a serial killer who has discovered the Internet as a hunting ground for himself and has given the expression 'social networking' a completely new meaning.
Dwight and Andy believe an insurance salesman calling on Michael is a Mafioso, while Kevin inadvertently ruins Jim and Pam's honeymoon.
Rachel tries to rescue Miles and to escape with a sick tribesman's wife, violent refugees assault Neville and Jason, Charlie and Adam can't agree on what to do with Monroe, and tribesmen threaten Willoughby.