Warning: This post contains spoilers for Tuesday's 500th episode of "NCIS." If you've been watching "NCIS" for the past two decades, this week's installment wasn't just another episode — it was a walk ...

Add Yahoo as a preferred source to see more of our stories on Google. We're used to seeing the intrepid team of naval special agents on CBS' crime procedural "NCIS" working together to solve the ...