We’ll leave the debate to the diehard fans on exactly when the show jumped the shark (we think when Gil Grissom and Sara Sidle got together), but it’s getting a chance to wrap things up, an opportunity that’s not given to many shows, even long-standing ones like Law & Order (cancelled in 2010 after 20 years). So in advance of tonight’s bookend episode, here are a six tidbits about CSI’s run (and the finale) we learned from the cast and creatives at a recent PaleyFest Salute to CSI: Who's In: The cast members who attended the PaleyFest event will be called back into duty during the finale: William Petersen, “Gil Grissom”; Marg Helgenberger, “Catherine Willows”; Ted Danson, “D.B. Russell”; Jorja Fox, “Sara Sidle”; Eric Szmanda, “Greg Sanders”; Robert David Hall, “Dr. Al Robbins”; David Berman, “David Phillips”; Wallace Langham, “David Hodges,” Elisabeth Harnois, “Morgan Brody”; Jon Wellner, “Henry Andrews”; and Paul Guilfoyle, “Captain Jim Brass.” Who's Out: Ostensibly missing from the finale are Laurence Fishburne, Elisabeth Shue and George Eads. (Original cast member Gary Dourdan's character died in season 9, so Warrick Brown would be harder to bring back.) Taking a chance on a newbie: CSI was series creator Anthony Zuiker’s first TV script, which he developed while working as a tram driver in Las Vegas.