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

Self - Historian

Frank Günther

Self - Engineer

Jeanne Hammond

Self - Niece of Edwin H. Armstrong

Loren Jones

Self - Engineer