The Lost Girls (CSI: Crime Scene Investigation) The Lost Girls (CSI: Crime Scene Investigation) "The Lost Girls" is the seventh episode of season 10 of "". It is also the final part of a crossover trilogy that links all three CSIs together for the first time; the trilogy began on "" with "Bone Voyage" and continued on "" with "Hammer Down". It features Laurence Fishburne as Dr. Ray Langston, who trails the case of a missing girl from Miami to New York and back to his home town of Las Vegas. Dr. Ray Langston is back in Las Vegas and still searching for Madeline Briggs after trying
CSI: Crime Scene Investigation (season 9) and Wendy attend a sci-fi convention ("A Space Oddity"). William Petersen and Gary Dourdan both depart the main cast, and are replaced by Lauren Lee Smith and Laurence Fishburne, respectively. Jorja Fox recurs. <onlyinclude></onlyinclude> CSI: Crime Scene Investigation (season 9) The ninth season of "" premiered on CBS on October 9, 2008 and ended May 14, 2009. The series stars William Petersen, Marg Helgenberger and Laurence Fishburne. As the team grieve for their fallen colleague ("For Warrick"), Grissom makes a life changing decision ("One to Go"), during the ninth season of "CSI". Also this season, Sara investigates the death of