'CSI' star Marg Helgenberger has told fans they haven't seen the last of her.

The 53-year-old actress - who plays Catherine Willows in the TV series - is leaving after 12 seasons, but she has hinted about a possible return one day.

She said: "You haven't seen the last of me."

Marg - who will bid farewell to the programme in a two-part episode which is set to end on Wednesday (25.01.12) - described the part as "quite a Journey" and "one of the best roles" she's ever had.

When asked if she would be willing to return at some point, she replied: "Oh, absolutely, in fact that was one of the reasons why it was a little easier for me to leave the show because the producers said to me practically every day the door is wide open. ...If I'm available and I'm up for it you betcha."