NCIS: Season 2, Episode 20

2 - 20: Red Cell

A marine is found dead on the school campus, his neck broken and the team immediately finds a suspect. However, they are forced to start again when they find the suspect has also suffered the same fate as the victim, having had his neck broken with his body being buried in a construction site. McGee and Abby discover a trace in the e-mails, a mysterious group called "Red Cell," which leads the team to believe that the marine must have been involved in a serious death game.