S4 E711/07/06

Sandblast -- Gibbs and the team investigate a suspected terrorist attack at a military country club that kills a Marine colonel. When an explosion kills a Marine Colonel on a military golf course, the NCIS team must work together with the Army Criminal Investigative Unit to find the killer. After a CIA tip leads them to an abandoned warehouse rigged to explode with a cell phone bomb, McGee uses his computer skills to tap into secret government files in order to track down the CIA informant and uncover the terrorist cell. Meanwhile, romantic sparks fly for both Gibbs and DiNozzo.