Gas! -Or- It Became Necessary to Destroy the World in Order to Save It.

Name: Gas! -Or- It Became Necessary to Destroy the World in Order to Save It.
Released: 1970-09-04
Cast: Bud Cort, Talia Shire, Elaine Giftos, Cindy Williams, Ben Vereen

A gas is let loose upon the world that kills anyone over 25 years old.