CSI: Crime Scene Investigation (season 7) chainsaw massacre ("Toe Tags"), a death at a church ("Double-Cross"), a kidnapping ("Burn Out"), a series of miniature killings ("Post Mortem"), the death of identical twins ("Happenstance"), and the return of a 1970s Mob Boss to Vegas ("Living Legend"). Meanwhile, Catherine faces the loss of her father ("Built to Kill"), Greg is assaulted ("Fannysmackin'"), Keppler faces his past ("Law of Gravity"), and the team attempt to hide their amusement when a man is found trapped in concrete ("Loco Motives"). Louise Lombard joins the main cast, and departs at the season's end. <onlyinclude></onlyinclude> CSI: Crime Scene Investigation (season 7) The seventh
CSI: The Experience "CSI: The Experience", visitors use the scientific information they gathered to answer a series of multiple-choice questions on touch screens. After completing the survey, visitors proceed to a recreation of Gil Grissom's office to present their case. Exhibit-goers can compare their scientific findings to those of expert crime scene investigators. The exhibit is geared toward adults and youth ages 12 and above. "CSI: The Experience" opened with a press preview on May 23, 2007 at the Museum of Science and Industry which was attended by stars from the cast of "CSI: Crime Scene Investigation", including William Petersen, Marg Helgenberger, Gary