For Michael Weatherly, though, filming the scene had an unexpected side effect. Alexander starred in the first two seasons of NCIS as NCIS Special Agent Caitlin Todd before the character was killed off in the final seconds of the Season 2 finale. That one filming choice may have looked cool on camera, but it had an impact on Michael Weatherly due to the blood that would soon splatter on his face. The scene in question has Caitlin, Tony, and Gibbs standing on a rooftop together and talking, with Tony standing directly behind Caitlin. And you see Michael Weatherly go like this [flinches], kind of flinch away before the squib hit.