Harry Allen's WBAI/NONFICTION guests have included Harvard African and African American Studies head Dr. Henry Louis Gates, documentary filmmakers Albert Maysles and Frederick Wiseman, Talking Heads bassist Tina Weymouth, physicists Brian Greene and Lisa Randall, Black Panther Party activist Kathleen Cleaver, journalist Mark Bowden (*Black Hawk Down*), blues singer Shemekia Copeland, underground comicswriter Harvey Pekar, digital rights attorney and activist Lawrence Lessig, director David Cronenberg, businessman Stedman Graham, dance music diva Ultra Naté, Hayden Planetarium head Neil deGrasse Tyson, motivational writer Po Bronson, cultural critic Ishmael Reed, poets Amiri Baraka and Nikki Giovanni, sculptor Richard Serra, jazz vocalist Dianne Reeves, and many other authors, writers, and personalities.