Lewis & Clark - The Journey of the Corps of Discovery

John Logan Allen

as Himself - Geographer

Stephen Ambrose

as Himself - Historian

Gerard Baker

as Himself - Mandan-Hidatsa

Kevin Conway

as Patrick Gass

Erica Funkhouser

as Herself - Writer

William Least Heat-Moon

as Himself - Writer

Gene Jones

as Joseph Whitehouse

Mylie Lawyer

as Herself - Descendant of Twisted Hair

James P. Ronda

as Himself - Historian

Murphy Guyer

as William Clark (voice)

Hal Holbrook

as Narrator (voice)

Sam Waterston

as Thomas Jefferson (voice)

Adam Arkin

as Merriwether Lewis (voice)

Matthew Broderick

as John Ordway (voice)

Dayton Duncan

as Himself - Writer