Pictures "CSI: Crime Scene Investigation" Celebrates 300th Episode October 20, 2013 / 3:00 PM MDT / CBS News CSI Celebrates 300th Episode CSI Celebrates 300th Episode CSI Celebrates 300th Episode CSI Celebrates 300th Episode CSI Celebrates 300th Episode CSI Celebrates 300th Episode CSI Celebrates 300th Episode CSI Celebrates 300th Episode CSI Celebrates 300th Episode CSI Celebrates 300th Episode CSI Celebrates 300th Episode CSI Celebrates 300th Episode CSI Celebrates 300th Episode CSI Celebrates 300th Episode CSI Celebrates 300th Episode
