Catherine Willows is back on the case. At least for one night.
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Former "CSI" star Marg Helgenberger, who played played Willows on the series until her departure from the series last year, will return for the CBS drama's 300th episode, which will air Oct. 23, the network said Tuesday.
On the episode, Willows will help solve a cold case that has haunted the team for 14 years. The episode will be a call-back to the show's beginnings, as the team investigates a homicide in the home of a reclusive former casino mogul who was a suspect in a similar crime in 2000. The CSI team recalls who they were and where they were in order to solve the cold case.
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Helgenberger stars in the network's upcoming drama "Intelligence," a high-tech intelligence operative enhanced with a super-computer microchip in his brain.
"CSI" returns for its 14th season Sept. 25.