CBS’ long-running forensic-sleuth series CSI: Crime Scene Investigation will celebrate its 300th episode with the return of original star Marg Helgenberger.
Helgenberger, who played cucumber-cool-but-caring forensic scientist Catherine Willows to boss Gil Grissom (William Petersen)’s über-rational approach, will help the team solve a cold case that has evaded them for more than a decade.
According to CBS, in the special episode we’ll see the team investigating a homicide that occurred at the home of a former casino mogul, who was also suspected of an all-too-similar crime that happened 14 years ago.
Helgenberger appeared on the show for a 12-season run, garnering Golden Globe and Emmy noms for her portrayal of Willows. Her last episode, “Willows in the Wind,” aired Jan. 25, 2012.
The 300th episode will air Wednesday, Oct. 23.