Ep 7. Na Kama Hele (Day Trippers)

When bones are discovered in the ocean, the team investigates the victim's identity with the help of a shark expert who was on the tour with the victim when he disappeared. Meanwhile, McGarrett becomes increasingly concerned about the increasingly dangerous behavior of one of his friends. As the investigation of the body continues, the team discovers a plot to smuggle drugs and endangered species into Hawaii, leading to a thrilling chase and a startling revelation about one of the team's own. Along the way, the team faces tough decisions about loyalty and trust as they work to solve the case and protect Hawaii.