The end of NCIS: Los Angeles' first season finally offered some clues about Callen's mysterious history. But in the tradition of the hit CBS franchise, every answer spawns three more questions.
"Everything you saw at the end of last season with Callen [Chris O'Donnell], in one way or another, is resolved," executive producer Shane Brennan tells us. "But it isn't necessarily resolved in a way that gives you an answer. You get an indication of something that's happened, and then you'll realize we're in for the long haul."
After Callen received some key details about his sister in the finale, the final moments of the episode revealed that someone has been following Callen - perhaps for a very long time. That element is what plays into the "long haul."
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