Grissom was originally supposed to be the lead character in this episode. Unfortunately, William Petersen was unavailable to film any scenes due to a family death, his nephew. The main figure then went to Nick Stokes.
In the original script, Grissom and Sara share a hotel room because Greg snores. They lay in separate beds talking about love and death. In the morning, Greg walks in on Sara showering in his room.
Although they're named in the credits, neither William Peterson (Gil Grissom) or Paul Guilfoyle (Jim Brass) appear in this episode.