There were serious rumors that Marg Helgenberger wouldn't even be returning for this season of CSI but that was soon dismissed.
Marg and new co-star Ted Danson joned a panel to discuss the upcoming 12th season of the hit CBS show on Wednesday. During the discussion, Danson opening said he's thrilled to be a part of the cast while Helgenberger stated that she plans to make the 12th season her last. She claimed to have a hard time letting go, hence her decision to stay on for now:
“having a hard time letting go and that I was not yet done playing this character. That’s why I decided to extend (my contract) a little bit.”Helgenberger plays the role of Catherine Willows on the show and is one of the few remaining stars from the original cast. I haven't really kept up on the show but I watched last season's final & thought it was crap...hopefully Danson can help them out a bit.
source