“Immortality Parts I and II” — Grissom and Willows return to help the CSI team solve a catastrophic case that paralyzes all of Las Vegas, on the special two-hour series finale of CSI: CRIME SCENE INVESTIGATION, Sunday, Sept. 27 (9:00-11:00 PM, ET/PT), on the CBS Television Network. 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. Pictured: Ted Danson and Jorja Fox Photo: Robert Voets/CBS ©2014 CBS Broadcasting, Inc. All Rights Reserved