Charlie Eppes

Charles Edward Eppes
Numb3rs character
David Krumholtz as Dr. Charles Eppes
First appearance	"Pilot"
Last appearance	"Cause and Effect"
Portrayed by	David Krumholtz
In-universe information
Gender	Male
Occupation	Applied mathematician FBI mathematical consultant Author
Family	Alan Eppes (father) Margaret Mann-Eppes (mother; deceased) Don Eppes (brother)
Spouse	Amita Ramanujan

Charles Edward Eppes, Ph.D., is a fictional character and one of the protagonists of the CBS crime drama Numbers. He is portrayed by David Krumholtz.

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, mentor and colleague Larry Fleinhardt, and his on-again/off-again girlfriend, former student and now wife, Amita Ramanujan, who further refines Charlie's approach and helps him stay focused. Charlie has consulted for the National Security Agency (NSA), in part as a cryptanalyst, for nearly five years, having attained TS/SCI security clearance. It was revoked at the end of season four after he transmitted information to Pakistan, but was later re-instated.