An undercover vice-squad detective wades into the murky world of prostitution to nab would-be, well-to-do johns. Also: a 20-year veteran tries to prevent a man from jumping off a bridge; police in full riot gear respond to a violent domestic dispute. Dennis Franz narrates.

Detectives from the Manhattan South homicide division try to figure out how a man died after falling into a manhole; a detective investigates three separate deaths, including a man who fell or was pushed from an apartment rooftop and a woman who jumped from a burning building. Dennis Franz narrates.

Homicide detectives in Brooklyn deal with harsh criticism from irate members of the West Indian community as they try to solve the murder of a neighborhood college student. Dennis Franz narrates.

A female officer, whose father is a police chief, goes undercover in Times Square to catch purse-snatchers and would-be johns. Also: a veteran mulls retirement after 20 years on the job. Dennis Franz narrates.

The late-night murder of the scion of a wealthy Chicago family makes headlines and creates headaches for the detectives from Manhattan South homicide. Dennis Franz narrates.

Veteran Special Victims Unit detectives use DNA technology to crack a 10-year-old rape case; a Bronx beat cop worries about her kids while she's on the job; Commissioner Ray Kelly tries to calm a city on high terror alert. Dennis Franz narrates.