CSI members discover that one of their own is in danger while the team attempts to investigate the murder of a navy contractor involved in confidential data sales.
Brennan and Booth find themselves saddled with a newborn when the child's mother is killed in a horror car accident.
The team struggles to identify a suspect, when a company that endangers sharks is threatened; Kamekona tries to earn his helicopter license.
The agents probe the death of a chef during a cooking competition. The investigation uncovers an array of suspects, from the chef's rivals to his estranged wife.
A young Spanish club promoter is found dead on the floor of his apartment. As the investigation develops, Mac clashes with a member of the Barcelona police who he suspects is not being entirely truthful.