Extremely popular crime drama series created by Dick Wolf. Unlike most such shows, which usually focus on either detectives or the criminal suit itself but never both, each Law & Order episode usually covers one murder case from discovery of the body, through the police investigation and resulting trial(s) and ends with a conviction, acquittal, or plea bargain.
Also unlike most police shows it does not show the process in a stylized or purely glamorous light but tries to portray it with more realism; dirty DA politics and bringing the wrong person to trial are not rare subplots.
Put a Jewish cop who's daughter was murdered with a partner with an ailing wife and you have a pretty generic cop show. Add in a district attorney who's often more interested in playing politics than solving crimes and his win-at-all-costs bulldog assistant DA, and you have Law & Order.