Ruth Zalduondo

Dexter's world is shaken when he is called to the crime scene of a massacre unlike any he's ever seen before, or so he thinks. A series of memories come streaming back that shock Dexter to his core.

Gibbs and the team are called in when a student at a Quantico base high school attaches a bomb to his body and holds his fellow students hostage, but is the teen acting alone? Gibbs must race to find the truth.

A 12-year-old altar boy is the prime suspect after a priest is shot. The CSI team uncover evidence of abuse at the boy's home, but face more questions than answers when his father is bludgeoned to death. Elsewhere, Horatio and Delko investigate when the charred remains of a pregnant woman are found.