CSI through the years — TIMELINE

Oct. 6, 2000: “CSI: Crime Scene Investigation” makes its debut with cast members William Petersen, Marg Helgenberger, Gary Dourdan, George Eads and Paul Guilfoyle
Oct. 13, 2000: First appearance by Sara Sidle (Jorja Fox)
Nov. 3, 2000: First appearance by assistant coroner David Phillips (David Berman)
Nov. 10, 2000: First appearance by Chief Medical Examiner Al Robbins (Robert David Hall)
Feb. 1, 2001: Series moves to Thursdays
May 16, 2002: Finishes the season as nation’s most-watched drama for the first of seven times
Sept. 22, 2002: Wins its first of just six Emmys, for Outstanding Makeup for a Series (Non-Prosthetic); it later won Emmys for sound editing, sound mixing, cinematography and visual effects
Sept. 23, 2002: “CSI: Miami” makes its debut
Jan. 9, 2003: First appearance by trace technician David Hodges (Wallace Langham)
May 15, 2003: Finishes the season as the nation’s most-watched show
July 2004: Eads and Fox are briefly fired amid reports of a work stoppage
Sept. 22, 2004: “CSI: NY” makes its debut
Nov. 11, 2004: First appearance by Detective Sofia Curtis (Louise Lombard)
Nov. 18, 2004: 100th episode
May 12, 2005: First appearance by toxicologist Henry Andrews (Jon Wellner)
Nov. 3, 2005: First appearance by DNA technician Wendy Simms (Liz Vassey)
Jan. 18, 2007: Liev Schreiber briefly joins the cast while Petersen takes a break to star in a play
June 2007: Named the most-watched show in the world for the first of five times at the Monte-Carlo Television Festival
Nov. 15, 2007: Fox leaves the series
Oct. 9, 2008: Dourdan leaves the series
Dec. 11, 2008: First appearance by Dr. Raymond Langston (Laurence Fishburne)
Jan. 15, 2009: Petersen leaves the series
April 2, 2009: 200th episode
Nov. 18, 2010: After making several recurring appearances, Fox officially rejoins the main cast
Feb. 3, 2011: Petersen returns as a guest star
May 5, 2011: First appearance by Morgan Brody (Elisabeth Harnois)
May 12, 2011: Fishburne leaves the series
Sept. 21, 2011: Series moves to Wednesdays; first appearance by D.B. Russell (Ted Danson)
Jan. 25, 2012: Helgenberger leaves the series
Feb. 15, 2012: First appearance by Julie Finlay (Elisabeth Shue)
April 8, 2012: “CSI: Miami” ends after 232 episodes
Feb. 22, 2013: “CSI: NY” ends after 197 episodes
Oct. 23, 2013: 300th episode; Helgenberger guest stars
May 7, 2014: Guilfoyle leaves the series
Sept. 28. 2014: Series moves to Sundays
Feb. 15, 2015: Eads leaves the series
March 4, 2015: “CSI: Cyber” makes its debut
May 13, 2015: CBS cancels the series
Sept. 27, 2015: “Immortality,” the two-part “CSI” finale and 336th and 337th episodes of the series, airs