Grissom (William Petersen) was supposed to be back for Catherine Willows' last episode as a regular in season 12, but producers decided against it. They didn't want it to overshadow her farewell. Both Grissom and Willows (Marg Helgenberger) returned for the two-hour final CSI episode "Immortality" on September 27, 2015, at the end of season 15.
Gil Grissom was played by William Petersen.
Yes. Jorja Fox will not be returning as a regular cast member, but she does plan to make guest appearances. It has been rumored that her coming back will mark the end of the Sara/Grissom (GSR) relationship, and that storyline will be ended by both her, and Grissom (Willam Peterson) departing the show.
When do CSI Miami come back on this year
I believe Grissom's final episode on CSI was Season 9, episode 10 - One to Go.
Grissom left CSI in the ninth season, with his last appearance in the episode titled "One to Go".
No, he appears in the original CSI, which is based in Las Vegas.
Yes, Sara Sidle and Gil Grissom have a baby via adoption in the later seasons of CSI. They adopt a child named Lilly.
No he did not die, he just resigned, to be with Sara
CSI:'s Gil Grissom has never gone to Miami to help with a case but during the CSI: Episode Cross Jurisdiction he sends Warrick and Catherine to Miami, and corresponds with them periodically through out the show.
Grissom says goodbye in that episode because it is his final appearance on CSI. The character is leaving the show and his farewell is depicted in that episode.
The episode is called One To Go.
No, Sarah Sidle and Gil Grissom are colleagues and have a close relationship but they are not married on the CSI television series. They share a strong professional and personal bond throughout the show's run.