David Aaron Baker

A series of murders in Manhattan seems random at first, then the police fear that a serial killer may be copying the crimes of another decades earlier.

The results of Frasier and Niles' childhood IQ tests are finally revealed, and one is much higher than the other.

After a video is posted online showing the beating and murder of a man burnt alive, Intelligence tracks down a group of vigilantes torturing and killing sex offenders.

Three teenagers die from drug overdose, and Danny sets out to find their narcotic source and bring the responsible to justice.

Saul attempts to track down those responsible for the Langley attack, recruiting an unlikely expert to follow the money trail. Quinn, troubled by the collateral damage from a recent mission, tries to take matters into his own hands. An embattled Carrie learns who is really on her side and the Brody family turns to therapy to mend their broken household.

The red cell team tries to find a serial killer who is travelling across the country kidnapping and then hanging his victims.