Charlie Eppes (played by David Krumholtz) is a fictional character and protagonist in the CBS crime drama Numb3rs.
Dr. Charles Edward Eppes is portrayed as 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, Charlie helps his brother Don Eppes solve many of his perplexing FBI cases, sometimes with the help of his best friend and colleague Larry Fleinhardt and his on-again off-again girlfriend and former student Amita Ramanujan, who further refine Charlie's approach and help him stay focused. Charlie has consulted for the NSA (National Security Agency), in part as a cryptanalyst, for nearly five years, having attained the highest level of national security clearance.
