Greg Zola

After a Navy commander is murdered on a beach, the team watches for a nude female sunbather who may be the only witness.

The CSI team has a problem after learning the family is deaf: now they have to find a new way to catch the killer. Meanwhile, more information is given on Lindsey's horrifying past and what led her to become a CSI.

A serial rapist sends a letter to the squad announcing his return to Philadelphia after five years and his plan to strike again.

Claire goes to college; Ando and Hiro start a Hero-for-hire agency; Peter becomes an EMT; Matt reunites with his wife and child.

A mysterious death pushes Claire into the spotlight; Angela worries that Nathan will discover his true identity; an unexpected visitor haunts Matt; H.R.G. and Tracy join forces.

When a mathematician (Neil Patrick Harris) gets close to solving the Riemann hypothesis, a difficult math problem whose solution is worth millions, his daughter is kidnapped.