The seventh season of the hit procedural begins with “The 34th Floor,” the conclusion to last season’s thrilling cliffhanger that has Danny and Lucy held hostage. Also, a new member joins Detective Mac Taylor and his team. Sela Ward stars as Josephine "Jo" Danville, an experienced investigator from Washington, D.C. whose work is driven by her empathy for the victim. It’s baptism by fire for Jo on her first day as she stumbles over a dead body in the crime lab. The tension escalates in future episodes when a young woman’s strangulation is witnessed during a live chat (“Unfriendly Chat”) and the leader of a powerful street gang is found murdered (“Sangre Por Sangre”). There’s no shortage of violent crimes in the city that never sleeps including the murder of a man in his defense attorney’s apartment during a daring heist (“Out Of The Sky”) and the discovery of a badly decomposed body that pits the CSI’s against an efficient killer the uses the parents of one of his victims to manipulate crime scenes (“Do Not Pass Go”).