<P> CSI: Crime Scene Investigation was produced by Jerry Bruckheimer Television and CBS Productions, which became CBS Paramount Television in the fall of 2006 and CBS Television Studios three years later . Formerly a co-production with the now - defunct Alliance Atlantis Communications, that company's interest was later bought by the investment firm GS Capital Partners, an affiliate of Goldman Sachs . CBS acquired AAC's international distribution rights to the program, though the non-US DVD distribution rights did not change (for example, Momentum Pictures continues to own UK DVD rights). The series is currently in syndication, and reruns are broadcast in the U.S. on Oxygen, Syfy and the USA Network on cable, with Ion Television holding the broadcast syndication rights . The show has aired in reruns on the USA Network since January 14, 2011 . The CSI catalog has been exclusive to the whole NBC Universal portfolio since September 2014, after several years with Viacom Media Networks' Spike and TV Land . </P> <P> CSI was shot at Rye Canyon, a corporate campus owned by Lockheed Martin situated in the Valencia area of Santa Clarita, California, but after episode 11, filming shifted to the Santa Clarita Studios, originally chosen for its similarity to the outskirts of Las Vegas . Occasionally, the cast still shot on location in Las Vegas (the season - four DVD set revealed that the episode "Suckers" was mostly shot during December 2003 in Las Vegas, where they filmed a Gothic club scene on location for rent, and in January 2004, some scenes were filmed at Caesars Palace), although primarily Las Vegas was used solely for second unit photography such as exterior shots of streets . Other California locations include Verdugo Hills High School, UCLA's Royce Hall, Pasadena City Hall, and California State University, Los Angeles . While shooting took place primarily at Universal Studios in Universal City, California, Santa Clarita's surroundings had proven so versatile, CSI still shot some outdoor scenes there . </P> <P> CSI's theme song was, since the last episode of season one, "Who Are You", written by Pete Townshend with vocals by lead singer Roger Daltrey of The Who . Daltrey made a special appearance in the season - seven episode "Living Legend", which also contained many musical references such as the words "Who's next" on a dry - erase board in the episode's opening sequence . In certain countries, to avoid music licensing fees, a unique theme was used, instead . </P> <P> Throughout the series, music played an important role; artists such as Ozzy Osbourne, The Wallflowers, John Mayer, and Akon (with Obie Trice) performed onscreen in the episodes "Skin in the Game", "The Accused Is Entitled", "Built To Kill, Part 1", and "Poppin' Tags", respectively . Mogwai was often heard during scenes showing forensic tests in progress, as were Radiohead and Cocteau Twins, but several other artists lent their music to CSI, including Rammstein and Linkin Park--used heavily in Lady Heather's story arc . Sigur Rós can be heard playing in the background in the episode "Slaves of Las Vegas", The Turtles in "Grave Danger", and Marilyn Manson in "Suckers". A cover of the Tears for Fears song "Mad World", arranged by Michael Andrews and featuring vocals by Gary Jules, was used in the pilot episode and during three episodes of season six ("Room Service", "Killer", and "Way to Go"). Industrial rock band Nine Inch Nails was also featured multiple times throughout the three series . One episode started with The Velvet Underground's excited rendition of "Sweet Jane" and ended with the downbeat version of Cowboy Junkies' revision of the song . Character David Hodges' good luck has, on occasion, been accompanied by Electric Light Orchestra's "Mr. Blue Sky". This song was first used in the season - seven episode "Lab Rats", and last used during season 10's "Field Mice". </P>

When did csi start using who are you