Teenage Charlie and his girlfriend Judy take a group of three teachers hostage when the educators end up stranded with car trouble at a remote junkyard. Charlie assures them they'll let them go once the car's fixed and the kids can leave, but Charlie's penchant for tormenting the adults and the sick joy he gets out of their suffering, suggests that none of them are likely to make it out of their current predicament alive.

This episode is also available as a blog post: http://randommoviemusings.com/2022/01/02/the-sadist-1963/