Law & Order: Criminal Intent S05E09 - Scared Crazy

The slaying of a young computer company employee has Detectives Goren and Eames poking around the stealth security employed by rival tech firms where they lock onto an unstable code-writer Robbie -- whom they believe is being manipulated by his secretive therapist as Katrina. Goren believes the key to the case lies with the suspect's paranoid behavior which could have been exploited after recent weeks of "treatment" under the doctor's bizarre care.