Emmy Award-winning actress Marg Helenberger is a seasoned vet of TV (“China Beach, “CSI,” “ER”), film (“Species,” “Erin Brockovich,” “Fire Down Below”), and films made for TV (“Death Dreams,”  “Lethal Vows,” “Perfect Murder, Perfect Town: JonBenét and the City of Boulder”) who made her on-screen debut as “Margi McCarty,” a weather girl at KHGI in Kearney, Neb. At the time, Helgenberger was a student at the University of Nebraska-Kearney, performing in campus theatre productions and working at a meat-packing plant as a “deboner” during the summers. Helgenberger eventually abandoned her short-lived career in weather forecasting and enrolled at Northeastern University where she continued to act in campus productions and was eventually cast in the long-time daytime soap opera, “Ryan’s Hope,” in 1982. Currently, Helgenberger is best known as Vegas showgirl-turned-forensic scientist Catherine Willows on “CSI,” a role that she’ll be leaving after 12 successful seasons in 2012.