The team must figure out how a young woman and a shark end up dead on the beach at the same time. This case gets even more interesting when a second body washes up on the beach.

Quinn Shelby observes the team at work to determine if the lab should get their annual accreditation.

Mac and his team finally believe they have captured the taxi cab killer but there is one problem - he is found dead. Mac must figure out how to keep the streets of New York City safe while continuing to track the elusive taxicab killer