NCIS: Los Angeles Season 4 Promo Videos: What We Know

The NCIS: Los Angeles season 4 premiere, called "Endgame," airs on September 25, but there's a new behind-the-scenes video, plus a new season promo video, that gives us quite a few hints as to what we can expect to see this season.
http://www.buddytv.com/articles/ncis-los-angeles/ncis-los-angeles-season-4-prom-47420.aspx
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