In 1999 he hosted an eight-part primetime series for ABC Nightline called Brave New World (which frequently featured his friends, They Might Be Giants, as musical guests).
Krulwich, in 2004, became the host and managing editor of the innovative PBS science program NOVA scienceNOW.
Em 2004, Krulwich tornou-se o anfitrião e gerente editor do inovador programa científico PBS NOVA scienceNow.
Em 2004, Krulwich tornou-se a anfitriã e gerente editora do inovador programa científico PBS NOVA scienceNow.