When a performer of the Cirque du Soleil finds the body of a young woman underneath the stage, Grissom and Catherine learn from the manager that the body was moved since she was in the crush zone. After several investigation, including of the surveillance video footage, Nick finds the victim was with a young man and discovers her purse in the ground cork. They find her name, Celia Noel, and tickets for every performance of the Cirque du Soleil. Soon they are able to resolve the case. Meanwhile, Capt. Brass, Sara and Warrick investigate the body of a man shot in the mouth with the revolver in his hand in a party promoted by Sam Braun to celebrate the implosion of the Rampart Casino to build his Eclipse Casino. Sam identifies the victim as Robert O'Brien, who was one of the investors with a few shares of Eclipse with his partner Joe Hirschoff, and he believes the shot was during the implosion. When CSI team learns that the revolver is registered in the name of Joe, he becomes a person of interest. Meanwhile, Catherine and Nick go to a bar afterhours and Nick finds a female acquaintance and leaves Catherine to dance with the woman. Catherine drinks at the counter and out of the blue, she wakes up naked on the bed at a motel. Brass is awarded with a Medal of Valor.
"Built to Kill: Part 1" is a good episode of "CSI" with several segments. The tragic accident of Celia Noel is resolved by the efficient investigators, but the suicide of death of Robert O'Brien, the possible rape of Catherine and the death of the man in the kitchen will be resolved in the sequel. Brass awarded with a meal is well deserved and fortunately he is safe and sound now. The tattoo with the date is different. My vote is seven.
Title (Brazil): "Built to Kill: Part 1"