America's top drama, "CSI," is coming back with a vengeance. The hit show might be losing main man William Petersen, but it is picking up a very sultry new addition. The lovely Lauren Lee Smith will be joining the CSI family in its 9th season, premiering this week!

"Everyone has just been so, so wonderful," Lauren tells ET of her new cast and crew mates. "I really was apprehensive at first."

The statuesque actress may seem like a fresh face, but she has been around Hollywood for quite a while. She was on the "L Word" and "The Dead Zone," and most recently co-starred in the horror thriller 'Pathology' with "Heroes" star Milo Ventimiglia.

Stay tuned, because Lauren will not be mixing things up in the lab until the third episode, but  the investigations start up again Thursday Oct. 9 on CBS.