Filmmakers researching the Pardue brothers are asking people who remember three explosions in Danbury in 1970 to share what they know. The documentary also examines bank robberies and killings linked to the brothers. The filmmakers are looking for photographs, news clippings and firsthand accounts. They’ll hold a public session tomorrow from 10 to 4 at the Danbury War Memorial, and another October 2nd at the Danbury Museum.