<P> After remaining separated for a number of years, Grissom and Sara are re-united in the series finale Immortality, when a case involving a suicide bomber brings Grissom temporarily back to the Las Vegas crime lab . The series ends with the pair sailing away together into the sunset, their relationship apparently rekindled . </P> <P> William Petersen has said that what Grissom loves about Sidle is her tenacity . "She's a bulldog . And he always saw that in her . And he always knew that subconsciously the only person who'd be able to give him a second look is someone who's not willing to take the first look for granted ." On her side, Jorja Fox has said that "The story of Sara and Grissom is a little like a fable . And most great fables don't really have 100 percent resolution ." </P> <P> Sara Sidle has gained an extensive fan base throughout the years . A romantic relationship between Sidle and her supervisor, Gil Grissom, was hinted at during the first years of the show; but it was only in Season 6 that the relationship was confirmed and then made definitive with Grissom's marriage proposal in Season 8 . </P> <P> Grissom and Sidle's relationship has been the subject of intense debate in the press and on - line forums, between fans of the romantic relationship and those who believe the romance detracts from what was once a show devoted mainly to mysteries and a forensics laboratory . </P>

What episode of csi did grissom and sara get together