The next case for the CSI’s gets even tougher when a paintball player turns out to be the prime suspect and later goes missing the team also has another problem the evidence that should point to the prime suspect points to someone else.

The team is led to a crime scene in the middle of the city involving a parachute jumper whose parachute apparently failed. And one CSI is injured when a snake is found at a crime scene.

Reed Garret gives Mac some interesting information regarding the death of a college student. Also the rest of the team will need to be a step ahead of Ava Brandt to figure out why a security guard was murdered.

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.

As the search for the taxi cab killer continues riding a cab gets very deadly. The team must figure out how to keep New York City safe.

Also Danny, Lindsey, and Flack investigate the murder of a man who made a half court shot during a game that both Danny and Flack were attending.

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