Ep 7. Sandblast

In NCIS season 4 episode 7, entitled "Sandblast," the team investigates a bomb explosion at a military museum in Washington D.C. The blast leaves a marine dead and another seriously injured, and the NCIS agents must determine whether the attack was targeted at the museum or the marine.

As they begin their investigation, the team discovers that the bomb was constructed using military-grade plastic explosives, leading them to believe that the perpetrator is someone with military experience. They also find evidence of a suspicious man near the museum prior to the explosion, and begin to suspect that he may be connected to the attack.

As the team digs deeper, they discover a web of lies and deceit among the museum staff, including the curator who seems to have something to hide. As they continue to investigate, they begin to unravel a larger conspiracy involving stolen weapons and military secrets.

Meanwhile, Tony and McGee compete to see who can complete more push-ups, leading to some hilarious banter and friendly competition between the two agents.

The episode is filled with tense moments as the team races against the clock to prevent another attack, while also dealing with personal struggles and conflicts within their own ranks. The season 4 episode demonstrates the strength of the NCIS team as they work together to uphold justice and protect national security.