Andres Saenz-Hudson

Gideon, Hotchner and their team head to Mexico to aid in the investigation of a serial killer who preys on the elderly.

When a policeman kills another officer, the CSIs must look to the evidence to determine if the shooting was premeditated or an accident.

When a student finds a former teacher's car keys in an old desk, Lilly and the team take a new look at the teacher's death, previously thought to be a fatal carjacking.

A newly determined Talbot takes Coulson to meet the enemy and attempts to stave off the destruction of Earth.

In part two of a two-part episode, a member of the team is pronounced dead after being shot in the head. Not wanting to give up, Horatio has the CSI rushed to the hospital and watches as doctors try to bring him back. Meanwhile, the CSIs find evidence that could lead them to Clavo Cruz, the man behind the shooting.