NCIS partners with the Coast Guard Investigative Service (CGIS) to investigate a suspicious explosion on board an oil rig. Meanwhile, no one is safe from a mysterious prankster who is targeting the NCIS team.
Borin: I didn't just lose three fellow Marines in that blast. Gibbs I lost my Marine. Liam. He always had to be the one leading the charge. That was his style. He was strong, stubborn. God. Cocky as all hell. Gibbs: Marine's a Marine.