This CBS procedural got its start in 2003 as a spinoff of JAG, which aired for an impressive 10 seasons.
2. Law & Order: 20 seasons
Dick Wolf’s original claim to fame aired between 1990 and 2010 on NBC, tying Gunsmoke as the longest-running dramatic show in American TV history until the record was broken by…
1. Law & Order: SVU: 21 seasons (and counting)
The second (and currently last remaining) entry in the Law & Order franchise premiered on NBC in 1999.
Criminal Minds ended its 15-season run on February 19, ranking as one of American TV’s longest procedurals. In fact, CBS claims a total of six series in the top 10 — which isn’t entirely surprising, given the procedural format “has become hard-wired into CBS’s identity,” as Ad Age once observed.
That said, the Eye Network can’t claim the top two spots in the ranking. Click through the gallery above to see the 10 longest-running primetime procedurals, ordered by their season counts and — in the event of a tie — their episode counts.