Re-edited feature version of serial The Phantom Empire (1935). Singer Gene Autry discovers a race of advanced humans living beneath the earth.
| Release Date | May 2, 1940 | |
|---|---|---|
| Status | Released | |
| Original Title | Men with Steel Faces | |
| Runtime | 1h 10min | |
| Budget | — | |
| Revenue | — | |
| Language | English | |
| Original Language | English | |
| Production Countries | United States of America | |
| Production Companies | ||