NCIS Director Mark Clookie makes cameo on the show

With all of the Hollywood gunfire and explosions on NCIS: Los Angeles, it's easy to forget that there's a real, working agency that's the basis of the top-rated CBS show. On tonight's episode, the director of the real-life NCIS makes a cameo appearance, and ET was on the set to see how he did!

"It's a pleasure to meet him … it's amazing to sit there and realize that the actual guys are watching our show," Chris O'Donnell tells ET of the real director of the Naval Criminal Investigative Service, Mark Clookie. "It was fun to see him in front of the camera. I mean, here's a guy whose life experience make it look like we've all been living sheltered lives. He was great, and very smooth."

Read the whole article on etonline.com.