Youthful character actor David Krumholtz received his start largely due to his resemblance to another established actor, but it was his natural ability and persevering work ethic that made him one of the more steadily employed actors of his generation. After being cast as Judd Hirsch's son in the Broadway drama "Conversations with My Father," he began picking up film work in features like "Addams Family Values" (1993) and "The Santa Clause" (1994). Early efforts to be cast in a successful television series failed to pan out, as was the case with the ill-fated "Chicago Sons" (NBC, 1996-97). Thankfully, these disappointments were balanced by noteworthy turns in respected films like Ang Lee's "The Ice Storm" (1997) and even more prominently in "The Slums of Beverly Hills" (1998). Well regarded by his peers, Krumholtz could frequently be seen making cameos on shows such as Judd Apatow's "Freaks & Geeks" (1999-2000) and "Undeclared" (FOX, 2001-02), but attempts to join the permanent cast of a successful series, as in "The Lyon's Den" (NBC, 2003-04), continued to elude him. Nonetheless, Krumholtz made his presence known with hilarious cameos in films like "Harold & Kumar Go to White Castle" (2004) and "Serenity" (2005). His persistence paid off, however, when he was cast on the hit crime drama "Numb3rs" (CBS, 2004-2010), opposite Rob Morrow. Even after the series ended its successful run, Krumholtz remained the epitome of the working actor, straddling the mediums of film and television with equal dexterity.