Oil & Water (NCIS)

"Oil & Water" is the 16th episode of the sixth season of the American police procedural drama NCIS. It originally aired on CBS in the United States on February 17, 2009. The episode revolves around the investigation into the death of a Navy petty officer who was working as a private tutor, and the complex relationships that are uncovered as a result of the investigation. The title, "Oil & Water," is a metaphor for the clashing personalities and contrasting backgrounds of the individuals involved in the case, highlighting their inherent incompatibility and the friction that ultimately contributes to the crime. The episode's plot also explores themes of family dynamics, social status, and the lengths people will go to protect their loved ones.