Grammy award-winning recording artist John Mayer and Danny Bonaduce guest star in part one of the two-part season premiere of CSI on Thursday, Sept. 21, on CBS. Mayer makes a cameo appearance, performing two new songs from his third studio album, Continuum.

Mayer performs his current single, "Waiting on the World to Change," as well as "Slow Dancing in a Burning Room," for Catherine and Nick at a nightclub. Bonaduce stars as an ex-rocker who ends up a murder victim.

In the season premiere, "Built To Kill, Part One," an aspiring dancer is murdered backstage during Cirque du Soleil's KA show, and the CSIs investigate what goes on behind-the-scenes to uncover the truth,

The CSIs investigate first-hand the behind-the-scenes action of Cirque du Soleil in order to determine what may have contributed to the young dancer's untimely death. Meanwhile, after Catherine and Nick visit a nightclub where John Mayer is performing, Catherine finds herself in jeopardy and must act as her own CSI in order to determine who may be targeting her and her family. Also, Grissom is perplexed after receiving an uncanny miniature replica of the crime scene he is investigating.