CSI: NY: Season 2, Episode 24

2 - 24: Charge of This Post

Mac, Lindsay, and Flack are called to a crime scene where a security guard is found stabbed to death in a stairwell. Investigating the surrounding area, however, Mac discovers a bomb. After warning the inhabitants, and before he and Flack can escape the building, the bomb goes off, severely injuring Flack and several others. Amid the following chaos and involvement of Homeland Security, as well as being contacted by the bomber who threatens to bomb another location, Mac flashes back to the 1983 Beirut bombing when he was a young Marine office