This episode introduces Michelle Forbes in the role of new chief medical examiner Julianna Cox. Descending upon a murder scene being investigated by Lewis (Clark Johnson) and Bayliss (Kyle Secor), the outspoken Cox makes no secret of her contempt for the detectives' methods of investigation. Meanwhile, the FBI probe of possible corruption in the arson unit so unnerves Kellerman (Reed Diamond) -- one of the Feds' chief targets -- that he begins lashing out at everyone close to him. And on the domestic front, Brodie (Max Perlich) throws a party for Lewis and his wife, which turns out to be a disaster. ~ Hal Erickson, Rovi