"My heart is full of joy and sadness at the same time. Love you all," added @danie_sepulveda, using the hashtag #CSIForever.
PHOTOS: Summer 2015 TV preview Those in Helgenberger's social media photos aren't the only ones returning to bid farewell to Jerry Bruckheimer's crime drama, which has spawned spinoffs including reports that Ted Danson, Jon Wellner, David Berman, Wallace Langham, Elisabeth Harnois, Robert David Hall, and Melinda Clarke will stop by for a final curtain call.
"Have to admit I got a little teary eyed seeing this one of you all together," user @allaboutmarg tweeted in response.But there's still the matter of Sidle's job in Las Vegas, where she's been promoted to the head of the CSI unit. "The question, and the characters gathered for the scene — Grissom (William Petersen), the former Las Vegas crime-scene-investigation team leader, colleague Catherine Willows (Marg Helgenberger) and the once-notorious Lady Heather (Melinda Clarke) — create an old-home-week feeling on the set of the two-hour finale (CBS, Sunday, 9 p.m. We're trying to paint it as we have done with Jorja [Fox] and Gary [Dourdan].Yes, and it was really really awkward because you could tell the actors weren't into it. Since she couldn't get with Warrick, Catherine just needs to hook up with Grissom in the final episodes...Soon after completing college, Helgenberger landed her first professional role on the long-running ABC Daytime soap opera in March 1982, playing amateur cop Siobhan Ryan Novak Du Bujak, a role previously played by Ann Gillespie.