Debuting in September 1990, had the original Law and Order still be on the air, it would be heading into its 25th season. With the renewal of Law and Order: Special Victims Unit, some form of Law and Order will have been on the air for 25 seasons. Pretty impressive for a scripted television franchise.
Renewal talks for the 16th season had been ongoing for quite some time, with Deadline noting financials played a major role in the discussions. Mariska Hargitay, who commands a hefty $400,000 per episode, is expected to return.