CSI

CSI's season-long hunt for Dr. Jekyll will finally come to a close, thanks to another serial murderer, Nate Haskell, aka The Dick and Jane Killer (Bill Irwin).

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At the end of last week's episode, Haskell told Dr. Ray Langtson (Laurence Fishburne) that he knows Dr. Jekyll's true identity. The finale (Thursday at 9/8c on CBS) features Haskell as the Hannibal Lecter to Langston's Agent Starling in a Silence of the Lambs­-­esque cat-and-mouse game.

"How much of what Haskell is giving them is truth?" executive producer Carol Mendelsohn tells TVGuide.com, noting that Captain Brass will be furious that the team is trusting a convicted killer to help. "Langston believes that in the lies are some truths, and that the truths that Haskell is spinning will actually help in the investigation. And little by little, they do get closer to Dr. Jekyll."

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But the show isn't all about Haskell, as viewers will finally see the face of Dr. Jekyll (Big Love's Matt Ross). "You will see him in physical form in all his glory, and we will find out everything — what he does for a living, why he kills — and I think we find out perhaps more than we've ever found out about any serial killer [on our show]," Mendelsohn says.

Mendelsohn promises that the traits that Jekyll and Langston share will also be revealed when some members of the team are held hostage by the serial killer. "You will spend a lot of time with Dr. Jekyll. We really get a window," she says. "We will be with Dr. Jekyll as he watches and waits for his last victim as they are dying. Some of the CSIs will be with him, but Dr. Jekyll will definitely have the upper hand."

And, yes, one of the CSIs will end up on the wrong end of Jekyll's gun. But keep your eyes on Haskell as well.

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"I don't think Nate Haskell ever does anything that's not planned out. Everything with him is calculated there is always a grand design," Mendelsohn says. "You have to watch until the very last frame of the show to see the final twist. The fans will see a fitting end for Dr. Jekyll., but the fans will not have seen the end of Nate Haskell."

Are you excited for the finale? Who do you think Dr. Jekyll will target?