CSI: Crime Scene Investigation (season 4) CSI: Crime Scene Investigation (season 4) The fourth season of "" premiered on CBS on September 25, 2003 and ended May 20, 2004. The series stars William Petersen and Marg Helgenberger. Nick accidentally leaks information to a news reporter ("Assume Nothing"), and Catherine tries to discover how a body ended up in a bathtub ("All for Our Country") during the fourth season of "CSI". Supervised by Grissom and Willows, the Las Vegas CSIs are tasked with investigating the bizarre, the unlikely, and the unprecedented, including a disappearing gun ("Homebodies"), the death of a baby during a heatwave ("Feeling the Heat"),
CSI: Crime Scene Investigation depiction of police procedure, which some consider to be decidedly lacking in realism. For instance, the show's characters not only investigate ("process") crime scenes, but they also conduct raids, engage in suspect pursuit and arrest, interrogate suspects, and solve cases, all of which falls under the responsibility of uniformed officers and detectives, not CSI personnel. Although 'some' detectives are also registered CSIs, this is exceedingly rare in actual life. It is considered an inappropriate and improbable practice to allow CSI personnel to be involved in detective work, as it would compromise the impartiality of scientific evidence and would be impracticably