David Krumholtz film credits include Ray, Harold and Kumar Go To White Castle, Serenity, Slums of Beverly Hills, The Mexican, Sidewalks of New York, Scorched, Ten Things I Hate About You, Liberty Heights, The Santa Claus and The Santa Claus 2. He most recently shot the television mockumentary Live! about an executive putting together a reality show with contestants playing Russian roulette, which will be released in 2007. His television credits include guest-starring roles in Undeclared, Freaks and Geeks and ER. He also starred in the television movie Big Shot: Confessions of a Campus Bookie. David plays the role of Charlie Eppes in the CBS series Numb3rs. Charlie Eppes is a young mathematical genius and professor of applied mathematics at the fictional California Institute of Science, CalSci (primarily based on Caltech, where some filming and mathematics consulting is done). As a world-class mathematician, he helps his brother Don Eppes to solve many of his perplexing FBI cases, sometimes with close friends and colleagues Larry Fleinhardt and Amita Ramanujan who further refine Charlie's approach and help him stay focused, and has consulted for the NSA for nearly five years, having attained the highest level of national security clearance.