Benton's probe into a stock scam of the Russian Mafia prompts threats against his life.
Beth goes under cover at a rehab facility.
Nikki Masucci's past comes back to haunt her; Wallace investigates the mob.
Benton becomes a suspect in the murder of a gangster's girlfriend after she spent the night at his place.
Benton learns that a candidate for city council is a convicted fugitive living under an assumed name.
The shooting of an African-American cop by a tourist leads Benton to a major scandal.
Benton investigates a renowned classical pianist who becomes romantically involved with Benton's estranged wife.
A Pulitzer Prize-winning investigative journalist (Oliver Platt) recruits college students to assist in uncovering headline stories.