The Phantom Creeps (1939 movie serial)
https://www.youtube.com/watch?v=5yxijqD8K4M&t - from the Cult Cinema Classics YouTube channel (4 hours long)
Synopsis:
A military intelligence officer and a pretty reporter try to find a scientist whose inventions can destroy the world.
Directed by Ford Beebe & Saul A. Goodkind.
Cast: Béla Lugosi, Dorothy Arnold & Robert Kent.
CHAPTER INDEX:
Chapter 1: The Menacing Power
Chapter 2: Death Stalks the Highways
Chapter 3: Crashing Timbers
Chapter 4: Invisible Terror
Chapter 5: Thundering Rails
Chapter 6: The Iron Monster
Chapter 7: The Menacing Mist
Chapter 8: Trapped in the Flames
Chapter 9: Speeding Doom
Chapter 10: Phantom Footprints
Chapter 11: The Blast
Chapter 12: To Destroy the World
Trivia:
The Rob Zombie song Meet the Creeper is based on this movie. Zombie has used robots and props based on the design of The Robot in several music videos and live shows.