Law & Order: Criminal Intent - Season 9 (2010)

The death of a talented but mean-spirited dance student leads the Major Case Squad to a mentally unstable classmate who is in an obsessive relationship with one of the victim's rivals.

A disgraced Iraq War veteran working as a bank manager is accused of killing an escort's boyfriend bent on extortion, but is he really taking the fall to protect his CEO and old war buddy?

A tormented social scientist haunted by his family's Holocaust past performs twisted social experiments on couples to test the limits of goodness in human nature.

The Major Case Squad discovers that a nurse's aide and her firefighter boyfriend may be attacking and killing unassuming young women, but which of the two is the real predator?

A former baseball star is beaten to death with a baseball bat. Was he killed to cover up a secret about a death of a classmate at a prep school 22 years earlier?

Nichols and Stevens discover that the murder of a magazine editor could be related to the Russian mob, but later uncover evidence of a relationship between the victim and the daughter of the editor who replaced him.

A confessed killer claims he is innocent of the murder he is about to be executed for, and more doubt is soon cast on the situation when a copycat killer begins to strike.

When the dead body of a college student is found in her dorm room completely drained of blood, Nichols and Stevens are forced to turn to the dark side of "vampire" culture for answers.

While investigating the murder of a catering business owner, Nichols and Stevens uncover evidence of an affair and a possible larger scandal involving a New York senator.

A Health and Human Resources employee trying to shake down the owners of a hospital dies under suspicious circumstances, and the investigation leads to a notorious mobster's son, who is trying to become a legitimate businessman.

Nichols investigates the death of an old family friend, which may be related to a fabled manuscript that dates back to the time of Christ. But his investigation is complicated by his past relationship with the victim's daughter.

A promising young boxer who was just released from prison after participating in a dog-fighting ring is put back under the microscope when a member of his old crew is found dead.

Detective Nichols reluctantly turns to his father for help as they race against time to find the potential next victim of a killer with three personalities.