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.
McGee: Rule number 70 - keep digging till you hit bottom. Abby: McGee! There is no rule 70. McGee: Well, I-- Abby: You just made up a rule. This McGibbs thing has really gone to your head. I don't even recognize you right now.