| Cast overview, first billed only: | |||
| Ted Danson | ... | D. B. Russell | |
| Jorja Fox | ... | Sara Sidle | |
| Eric Szmanda | ... | Greg Sanders | |
| Robert David Hall | ... | Al Robbins | |
| Wallace Langham | ... | David Hodges | |
| David Berman | ... | David Phillips | |
| Elisabeth Harnois | ... | Morgan Brody | |
| Jon Wellner | ... | Henry Andrews | |
| William Petersen | ... | Gil Grissom | |
| Marg Helgenberger | ... | Catherine Willows | |
| Paul Guilfoyle | ... | Jim Brass | |
| Michael Beach | ... | Harbor Patrol SD Scinta | |
| Doug Hutchison | ... | Dalton Betton | |
| Katie Stevens | ... | Lindsey Willows | |
| Breeda Wool | ... | Rebecca O'Bryan | |
Grissom and Willows return to help the CSI team solve a catastrophic case that paralyzes all of Las Vegas, on the special two-part series finale. Past and current series stars scheduled to appear include William Petersen, Marg Helgenberger, Ted Danson, Jorja Fox, Eric Szmanda, Robert David Hall, Paul Guilfoyle, Wallace Langham, David Berman, Elisabeth Harnois and Jon Wellner. Also, Melinda Clarke returns as Lady Heather. (Part 2 of 2)
It was so great seeing the OG all back in this episode! <3 Just wish Nick was there as well, since he's my favorite (he shares the spot with Greg) ;) ... But all in all it was a nice ending and it gave us fans a glimps into the future of our favorite characters ...