This short begins at Boulder Dam (now Hoover Dam). The electricity generated here by the Colorado River is sent to Hollywood, where movie studios need it to make movies. After a tour of the MGM studios' power plants, we see short advertisements for upcoming MGM releases.
Judy Garland
Self (uncredited)Ray Bolger
Self (uncredited)Jo Ann Sayers
SelfFrank Whitbeck
Narrator (voice) (uncredited)