A wildly popular police procedural has set a Guinness World Record. Variety reports that the CBS series “CSI” broke the record for largest TV drama simulcast of all time.

On March 4, dubbed “World CSI Day” by CBS, the show aired as a simulcast in 171 countries.

“The particular episode that broke the world record, titled ‘Kitty,’ originally aired in the States on April 30, 2014, and acted as the planted spinoff for ‘CSI: Cyber,’ which premiered as its own standalone series this month,” Variety reports.

“Cyber” is the latest spinoff from a franchise that has also spawned “CSI: Miami” and “CSI: NY.” “Miami” ended its 10-season run in 2012, followed by “NY” wrapping in 2013 after nine seasons.

“World CSI Day” marked 15 years of the “CSI” franchise, and was a part of the kickoff for “CSI: Cyber.”

Variety notes: “The previous Guinness World Record for the largest TV drama simulcast belonged to ‘Doctor Who’ for the 50th anniversary special, which was seen in 98 countries in November 2013.”