Zombies of the Stratosphere, the 1952 Fred C. Brannon science fiction (sci-fi) action thriller serial ("A Republic Serial in 12 Chapters"; "Written by Ronald Davidson") starring Judd Holdren, Aline Towne, Wilson Wood, Lane Bradford, Stanley Waxman, and Leonard Nimoy (in an unbilled role as one of the aliens!). Note that this serial has cool rocket men (just like in Commando Cody), funky robots, and pretty cheesy aliens (one of whom is Leonard Nimoy, and even though he is unbilled, he is prominent on several movie paper items