David Krumholtz stars as Charlie Eppes, a genius mathematician who is recruited by his FBI agent bother Don to help solve the FBI's most difficult cases in CBS Paramount Network Television's one-hour drama NUMB3RS for CBS. Krumholtz has appeared in "Bobby," the story of Senator Robert F. Kennedy's 1968 assassination, Jack Black's comedy "Tenacious D: The Pick of Destiny." He has also been featured in Universal's Oscar-winning movie "Ray," and starred in the cult-comedy favorite "Harold and Kumar Go to White Castle." Additional big screen credits include "Serenity," "Santa Clause 2," "Slums of Beverly Hills," "The Mexican," "Sidewalks of New York," "Scorched," "Ten Things I Hate About You," and Barry Levinson's critically-acclaimed "Liberty Heights." Notable television appearances include guest starring roles on "Undeclared," "Freaks and Geeks," and "ER," where he portrayed mentally disturbed patient Paul Sobriki, who fatally stabbed series regular Kellie Martin. Krumholtz received acclaim in the made-for-television film "Big Shot: Confessions of a Campus Bookie." Krumholtz currently resides in Los Angeles.