With the new season just three weeks away, CBS has unveiled the details surrounding the CSI franchise premieres.

Monday, September 18 marks the beginning of CSI:Miami’s fifth season. In “Rio,” Horatio (David Caruso) and Delko (Adam Rodriguez) go to Brazil to avenge Marisol’s death. They are close to catching her killer, Riaz, when Horatio encounters family problems. In Rio, Horatio reunites with Yelina (Sofia Milos) and learns his brother Raymond is deep undercover in Riaz’s drug ring, while Horatio’s nephew Ray Jr. works as a drug mule for Riaz, smuggling drugs into the U.S. The stakes are high as Horatio must catch Riaz before he claims the life of another member of Horatio’s family. Joe Chappelle directed the episode written by series co-executive producer Sunil Nayar.

Scenes from this episode were shot on location in Rio de Janeiro, Brazil. Sofia Milos returns as Yelina Salas.

On Wednesday, September 20, CBS rolls out the first episode of CSI:NY’s third season. In “People With Money,” when a man is found dead on the Brooklyn Bridge and the only evidence is his marriage proposal displayed in lights on a Manhattan high-rise and a souvenir key chain as a murder weapon buried in his chest, the team comes together to find the person who may have brutally rejected his offer. Rob Bailey directed the episode written by executive producers Pam Veasey and Peter M. Lenkov.

Claire Forlani guest stars in a recurring role as Dr. Peyton Driscoll, a new medical examiner and love interest to Detective Mac Taylor. Emmanuelle Vaugier (“Two and a Half Men”) guest stars in a recurring role as CSI Detective Jennifer Angell. Michael Nouri (“The O.C.,” “Flashdance”) guest stars as Denney Lancaster, the father of the woman whose boyfriend was found dead on the Brooklyn Bridge.

Last season concluded with Flack suffering severe injuries when a bomb detonated inside a building and Stella fighting to regain herself after a brutal attack by her boyfriend. The new season finds Flack back on the job after slowly recovering from his injuries and Mac find companionship in Dr. Driscoll, creating a challenge as he tries to manage the intersection of his professional and personal lives.

Stella and Lindsey investigate the death of a young man, whose murder was witnessed by bungee jumpers who were illegally plunging off the Brooklyn Bridge.

Hawkes and Danny investigate the murder of a New York heiress which leads them to Manhattan’s hippest clubs, where the young, wealthy and bored find a new form of entertainment: pitting their bodyguards against one another and betting on who will win.

Scenes from this episode were filmed on location in New York.

On Thursday, September 21, CSI kicks off its seventh season in the first of two installments. In “Built to Kill, Part One,” when an aspiring dancer is murdered backstage during Cirque du Soleil’s KA show, the CSIs investigate what goes on behind-the-scenes to uncover the truth. Kenneth Fink directed the episode from a story by Sarah Goldfinger and a teleplay by David Rambo and executive producer Naren Shankar.

The CSIs investigate Cirque du Soleil behind-the-scenes to determine what may have caused the young dancer’s untimely death. Meanwhile, after Catherine and Nick visit a nightclub where John Mayer performs, Catherine finds herself in jeopardy and must act as her own CSI in order to determine who may be targeting her and her family.

Grissom is perplexed after receiving an uncanny miniature replica of the crime scene he is working.

Grammy winning recording artist John 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” and plays “Slow Dancing in a Burning Room” for Catherine and Nick at a nightclub.

Danny Bonaduce (“The Partridge Family”) guest stars as Izzy, an ex-rocker who ends up dead.

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