https://www.imdb.com/title/tt0035613/
A group of flying cadets have to clear themselves of a murder charge, while trying to stop a traitorous scientist from selling secrets to the Nazis.
https://www.imdb.com/title/tt0124239/
Follows a track doctor and former driver, his former rival and owner of the track, owner’s young sister who has a crush on the doctor, a photographer, bar owner and other characters who work and mingle at the local auto race track.
https://www.imdb.com/title/tt0038007/
A Martian spacecraft crash-lands near an observatory of the designer of
Earth’s first spaceship. The survivor can assume the form of any
earthman. Calling himself the "purple monster", the invader sets about
gaining control of the scientists rocket project. His plan is steal
the plans, build a ship, return to Mars and using the design, build a
fleet to carry invasion forces to Earth.
https://www.imdb.com/title/tt0031621/
Mandrake and his assistant Lothar are working the cruise lines and make the acquaintance of Professor Houston who has developed a radium energy machine, which is much coveted by a masked Crime Lord known as "The Wasp".
https://www.imdb.com/title/tt0408377/
The complete first and second series of the New Captain Scarlet. Captain Scarlet is the indestructible hero of the Spectrum agency, at war with the evil Mysterons. Even though they managed to kill him with a self-made weapon, the Mysterons rebuilt Scarlet as an invincible human replica to infiltrate Earth and lead their war against our planet. But Captain Scarlet’s human psyche survived, took control of his human body, and now this indestructible hero leads the fight against the evil Martian invaders. Includes all twelve episodes from the each series.
https://www.imdb.com/title/tt0025940/
A 12-episode Universal serial in which a son avenges the death of his father at the hands of corrupt politicians. He develops a wide variety of complex devices in his crusade . . . ray guns, robots and a ‘vanishing belt.’ Note: The serial features what is believed to be the first appearance of a hand held ray gun in film.
https://www.imdb.com/title/tt0118398/
Guy finds himself in the company of a group of odd and sinisterly exuberant people after getting engaged to the mysterious Melissa. Soon, he’ll become a suspect in a series of grizzly murders and will have to solve them to clear his name.
https://www.imdb.com/title/tt00077025/
The saga of a Jewish family’s struggle to survive the horror of Nazi Germany’s systematic marginalization and extermination of their community.
https://www.imdb.com/title/tt0038248/
A bit different from the standard serial in that this is a murder mystery.
Beginning with the second chapter, each suspect is trotted out after the
credits while the narrator points out incriminating things about him/her.
https://www.imdb.com/title/tt0364146/
An earthquake reaching a 10.5 magnitude on the Richter scale, strikes the west coast of the U.S. and Canada. A large portion of land falls into the ocean, and the situation is worsened by aftershocks and tsunami.