ET has the latest...

With the news that William Petersen will be leaving the hit CBS show 'CSI' after the upcoming season's 10th episode, there's been wide speculation who would fill the post. Now, CBS Entertainment President Nina Tasler reveals to ET what big names they've considered.

Tasler says that big-screen star John Malkovich and Laurence Fishburne of 'The Matrix' fame are two of the names the network had considered for the role. Now that those names have come and gone from discussions, she said that "Moonlight" star Alex O'Loughlin would be someone they would consider.