CSI

CSI may refer to:

• CSI (franchise)
  • ; a television series starring William Petersen and Marg Helgenberger.
    • Cross Jurisdictions; a CSI TV event guest starring David Caruso.
  • ; the first CSI spin-off, starring David Caruso and Kim Delaney.
    • MIA/NYC Nonstop; a CSI TV event guest starring Gary Sinise.
  • ; the second CSI spin-off, starring Gary Sinise.
    • ; a three part television event featuring the casts of CSI, CSI Miami and CSI NY.
  • ; the third CSI spin-off, starring Patricia Arquette and James Van Der Beek
  • Immortality (CSI); a 2015 television movie starring William Petersen and Marg Helgenberger.

CSI: Crime Scene Investigation (also referred to as CSI) is an American police procedural drama television series that premiered on CBS October 6, 2000. The series, starring William Petersen, Marg Helgenberger, Laurence Fishburne, Ted Danson, and Elisabeth Shue, is the first in the CSI franchise. The series concluded on September 27, 2015, with a two-hour TV movie entitled Immortality.

Caesium iodide (chemical formula CsI) is the ionic compound of caesium and iodine. It is often used as the input phosphor of an x-ray image intensifier tube found in fluoroscopy equipment. Caesium iodide photocathodes are highly efficient at extreme ultraviolet wavelengths.