The good 'ol days are back for fans of CSI: Las Vegas.

After 15 years of heartbreaking departures and unexpected returns, the CBS drama will close out its run by reunited the majority of the original team. It's been a long tie since the likes of Grissom (William Petersen) and Willows (Marg Helgenberger) have shared the screen, and now long time fans can get a glimpse of their old favs in new photos from the series' finale.

Title "Immortality: Part 1" and "Immortality: Part 2," the two-hour event will star Petersen, Helgenberger, Ted Danson (D.B. Russell), Jorja Fox (Sara Sidle), Eric Szmanda (Greg Sanders), Robert David Hall (Dr. Robbins), Paul Guilfoyle (Jim Brass), David Berman (David Phillips), Wallace Langham (David Hodges), Elisabeth Harnois (Morgan Brody), and Jon Wellner (Henry Andrews). Although George Eads will not return, Melinda Clarke's Lady Heather will appear once more.

Little is known about the plot other than the fact that the team will be drawn together when a "catastrophic case" paralyzes Sin City.

There is still one long month to go before the finale, but you can check out photos of Russell, Sidle, Brass, and Willow above. Get a special look at Grissom and Willows by clicking here.

See how the series ends Sept. 27 on CBS.