written, produced and directed by Mark Davis ; a NOVA production by MDTV Productions for WGBH/Boston in association with National Geographic Channel International
a BBC/WGBH Boston/ProSieben co-production [in association with France 3 ; produced and directed by John Hayes Fisher ; produced for Nova by Gary Glassman ; senior executive producer, Paula S. Apsell
an American Mystery! special, a production of Wildwood Enterprises and Granada Entertainment in association with WGBH Boston for the Public Broadcasting Service, the Corporation for Public Broadcasting, and Carlton International ; producer, Craig McNeil ; teleplay by Alice Arlen ; directed by Chris Eyre