A submarine to transport drugs? Yes.
On NCIS: Los Angeles Season 5 Episode 24, the team started out looking into the possible suicide of Lt. Hill, but the investigation took a sharp turn to be about drugs and terrorism.
Each step the team took that brought them closer to the truth, the more danger they were in.
Overall, the finale was riveting as the mystery unfolded and the truth was revealed. I had an issue with the premise of the case. If Lt. Hill was such a threat to United States security that NCIS was brought in to investigate his death, why wasn't NCIS already looking into his disappearance? That seems like a big oversight.
The other problem I had with the hour pertained to Deeks, Kensi and Talia. I enjoyed the awkward meeting between the two women at the crime scene and even Talia's "Malibu Barbie" comment was pretty funny. I didn't at all care for the competition that took place back at the boat shed. It was embarrassing and unprofessional.