the New York Center for Visual History in co-production with KCET and the BBC ; Executive producer, Lawrence Pikethly ; directors and producers vary ; hosted by John Lithgow
a Nutopia Ltd. production for PBS in association with OPB and BBC ; executive producers for Nutopia, Peter Lovering, Jane Root, Michael Jackson, and Steven Johnson ; series producer, Diene Petterle ; producer[s] and director[s], Nic Stacey, Julian Jones, Paul Olding