James Craig (Russ Bradford)
Gloria Talbott (Susan Winter)
Lon Chaney Jr. (Martin Melville)
Tom Drake (Lee Brand)
Duncan "Dean" Parkin (Bruce Barton)
Vicente Padula (Governor)
Susan Winter and a group of other people - pilot Lee Brand, bacteriologist Russ Bradford and wealthy businessman Martin Melville - go searching for Susan's missing fiance Bruce Barton in a desolate Mexican desert. They discover that Bruce has been mutated into a gigantic, one-eyed "cyclops" by the radiation from uranium deposits.
Seen at the airfield.
The primary airplane, bought by Susan and flown by Lee. Registration N6647M.