Investigation or Investigations may refer to: Law enforcement Investigation, the work of a detective Investigation, the work of a private investigator Criminal investigation, the study of facts, used to identify, locate and prove the guilt of an accused criminal Criminal investigation department, the branch of British Police force to which plainclothes detectives belong Federal Bureau of Investigation, the primary investigative arm of the US Department of Justice Tax investigation Medicine Clinical trial, an investigation conducted to collect data for new drugs or devices Investigational New Drug, a category in a USFDA program Outbreak Investigation Science and maths Forensic science investigation, in fields such as accounting, science, engineering and information technology Investigations in Numbers, Data, and Space, a K-5 mathematics curriculum Arts, entertainment, and media Literature The Investigation, a 1959 book by Stanisław Lem The Investigation (play), a 1965 play by Peter Weiss Television "Investigations" (Star Trek: Voyager), an episode of the television series Star Trek: Voyager Investigation (TV channel), a Canadian French-language specialty channel The Investigation (TV series), a 2020 six-part Danish TV series Investigation Discovery, a digital cable channel Other uses in arts, entertainment, and media Investigate (magazine), a New Zealand current affairs magazine Investigation (film), a 2006 Bulgarian drama Investigative journalism, the practice of in-depth reporting or analysis Temporal Investigations, an agency of the government of the United Federation of Planets in the fictional universe of Star Trek See also Discovery (observation), the act of detecting something new, or something "old" that had been unrecognized as meaningful Examination (disambiguation) Forensic science, in fields such as accounting, science, engineering and information technology Investigator (disambiguation) Research