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When a car bomb kills three young boys and injures their mother, the investigation reveals the woman's postpartum depression and questionable behavior by the father.

Radiation poisoning kills a tormented scientist, leading Goren and Eames to investigate the victim's collaborator, a famous physicist with a trophy wife.

Intelligence works the case of a wealthy diamond dealer gunned down on Antonio’s watch.

A major heroin bust puts Olinsky’s family in danger. Lindsay makes a life changing career decision.

A risky undercover operation in a rough prison could expose a suspected serial killer's secrets.

A car belonging to a missing man erupts in a blaze, leading to clues regarding his whereabouts.

Alicia must decide if she'll stand by Peter or pursue Will.

Torn between her passion for Will and her marriage to Peter, Alicia is forced to make her choice.

The team investigates its own department when Horatio's ex-girlfriend is killed in an explosion.

A serial killer leaves cryptic hints and dead bodies for the team.