ET was with the stars of CSI: Crime Scene Investigation as they prepared for their emotional goodbye to the long-running CBS show, and we brought along footage from the early years for the cast members to reminisce about.
The groundbreaking crime procedural is ending with a two-hour series finale on Sunday, Sept. 27 after 15 years and more than 300 episodes.
"It's very emotional," Ted Danson told ET. "Fifteen years -- that's what's great about this wrap-up episode."
ET's Cameron Mathison once guest starred as a suspect on the show and he was thrilled to go back to the set before its swan song, which will include original cast members William Petersen and Marg Helgenberger.
"I finished [the script] and went, 'Yeah, it's pretty good. I think the fans are going to like this,'" Helgenberger said. "Then I read the words 'End of Series' and I burst into tears on the plane."