History Channel original series ; producer, Allison Hynes ; produced by Authentic Entertainment, Inc. in association with Thirty Four Productions, LLC for the History Channel
producer, Melody Shafir ; producer/co-writer, Michael Guillen ; produced by Popular Arts Entertainment Inc. for History Channel Television Network Productions ; A & E Television Networks
written, produced and directed by Gary Glassman ; edited and co-produced by Rob Tinworth ; a NOVA production by Providence Pictures, co-produced with ZED and ARTE France
a Unicorn Project presents ; based on the book City by David Macaulay ; produced and directed by Larry Klein ; written and co-produced by Mark Olshaker
writer and director, Peter Oxley ; producers, Anika Pilnei, Olive King ; a Blink Films/Associated Producers Ltd production for PBS, Channel 5, SBS Australia, Visions and PBS