The Unearthly

A No Budget B Movie thriller from 1957.

Professor Charles Conway (John Carradine) is a Mad Scientist attempting to develop the proverbial Fountain of Youth by creating "the 17th gland". Ignoring all aspects of scientific ethics, his research subjects are people who have no family and are under the impression that Conway can cure their depression. However, his research hasn't been successful and his subjects are turned into grotesque zombies. Some of Conway's patients begin to catch on to his scheme and intend to stop him.

For the Mystery Science Theater 3000 version, please go to the episode recap page.

Tropes:

 * Immortality Immorality: He hasn't actually achieved it yet, but Conway keeps up his gruesome glandular experiments trying to figure it out.
 * Mad Scientist: Professor Conway, of course.
 * We Will Use Manual Labor in The Future: Conway has a bunch of cavemen in his basement, turning some sort of power turbine to keep his machines running.