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When the ancient continent of Mu sank beneath the ocean, some of its inhabitant survived in caverns beneath the sea. Cowboy singer Gene Autry stumbles upon the civilization, now buried ... See full summary »
The main role was meant for Ken Maynard, but he dropped out due to the low-budget policies of Mascot Pictures and producer Nat Levine.
Gene Autry! How do you like our world?
Gene Autry: I think the dampness and dead air of your land is more suited for rats and moles.
Opening Credit: Featuring the Scientific City of Murania.
Re-edited into a 70-minute feature released as _Men With Steel Faces (1940)_
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