Tom Selleck, star of CBS' "Blue Bloods," revealed that his favorite episode of the show is "The Job" from Season 2. In this episode, Selleck's character, Frank Reagan, deals with survivor's guilt from being in the World Trade Center on September 11, 2001. Selleck said he found himself fighting back tears while performing this emotional storyline, as it was still fresh in people's minds at the time. The episode also tackled the issue of health complications faced by those who were present during the 9/11 attacks.