Kapu (forbidden) - [s3e12]

The Five-0 team investigates the death of a college professor whose body was discovered in a tub of acid by a student during a fraternity hazing ritual. The investigation leads the team to a northern private island wildlife reserve where the professor was secretly studying an extinct plant that could potentially cure a rare disease. Subplots:

Depending on the time zone and viewer votes, the identified killer varied: [S3E12] Kapu (Forbidden)