Paul Vincent Guilfoyle is an American television and film actor. He was a regular cast member of the CBS crime drama CSI: Crime Scene Investigation, on which he played Captain Jim Brass from 2000 to 2014. He returned for the series finale, "Immortality", in 2015. He also returned for two episodes in the sequel CSI: Vegas.

CSI: Crime Scene Investigation, also referred to as CSI and CSI: Las Vegas, is an American procedural forensics crime drama television series that ran on CBS from October 6, 2000, to September 27, 2015, spanning 15 seasons. It is the first series in the CSI franchise. The series originally starred William Petersen, Marg Helgenberger, Gary Dourdan, George Eads, Jorja Fox and Paul Guilfoyle. Other cast members included Eric Szmanda, Robert David Hall, Louise Lombard, Wallace Langham, Lauren Lee Smith, Ted Danson, Laurence Fishburne, and Elisabeth Shue. The series concluded with a feature-length finale, "Immortality".