Peter MacNicol is an American actor whose screen career began back in 1981 with a supporting role in the fantasy film Dragonslayer. He has in general specialized in bureaucrats and sycophants, although usually with a humorous quality, as shown in his wonderful support of Steve Martin in 1992's Housesitter. His capacity for drama is on display in 24 as a Machiavellian White House chief of staff. Peter picked up an Emmy in 2001 for his work on Ally McBeal. Peter and David Krumholtz both worked on Addams Family Values, though not together in a scene. He plays the quirky, quixotic but loyal Larry Fleinhardt on Numb3rs.