As CBS continues to hammer out plans for a finale to its long-running crime drama CSI, the big question is whether original star William Petersen will return. No one is commenting but I hear that is very much a possibility. The network is expected to unveil its plans for CSI‘s final chapter, believed to be a TV movie event, at its upfront presentation tomorrow.

Petersen, who has remained an executive producer on CSI following his on-screen exit, not only helped put CSI on the map, he helped put the show on the air. The actor was one of the biggest names on CBS’ talent roster during the 2000 pilot season with a rich talent deal, and of all the scripts he was presented with, he picked a forensic crime drama from then-novice writer Anthony Zuiker. Peterson’s character Gil Grissom was synonymous with CSI for the first nine years. It would mean a lot to fans if he came back the way The Office star Steve Carell returned for the cult NBC comedy’s last episode.