Sydney Walsh

When the chief investigator of a controversial report documenting corruption within the NYPD is gunned down the day before his findings are published, Mac and Stella must find the killer, launching a massive search that makes every officer listed in the report a suspect. Meanwhile, Danny and Aiden investigate the murder of a gypsy cab driver.

Jessica joins old friend Haskell Drake (Harry Guardino) to investigate a corrupt publisher's unexpected death.

Joe begins to fear for his daughter's life when Allison cannot get a murderer, who kills young women, out of her head.

After being subpoenaed to testify at the jury probe of a brokerage house, Jessica is charged with contempt for speaking to a witness who is killed.

When Julia surprises Matt having sex with both Vanessa Bartholomew (recurring guest star Kate Mara) and Ridley Lange (recurring guest star Sophia Bush), she humiliates him by demanding an intervention with Ridley's nonplussed mother and Vanessa's outraged parents, who didn't even know that Vanessa is a lesbian.

Hunter must prove an elusive international criminal set him up for an assault charge.