Jason Robards
Narrator (voice)
Red Barber
Self - Radio Announcer
Erik Barnouw
Self - Historian
Ken Bilby
Self - Biographer of David Sarnoff
Norman Corwin
Self - Writer
Susan Douglas
Frank Günther
Self - Engineer
Jeanne Hammond
Self - Niece of Edwin H. Armstrong
Loren Jones
Garrison Keillor
Helen Kelley
Self - Radio Broadcaster
Robert Morris
Dana Raymond
Self - Friend of Edwin H. Armstrong
Gertrude Tyne
