Gas! -Or- It Became Necessary to Destroy the World in Order to Save It. 1970

Synopsis:

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

Directed by: Roger Corman
Release date: 1970-09-04
Runtime: 79 minutes
Tagline: Invite a few friends over to watch the end of the world!
Cast:
Bud Cort
Bud Cort
Hooper 
Talia Shire
Talia Shire
Coralee 
Elaine Giftos
Elaine Giftos
Cilla 
Cindy Williams
Cindy Williams
Marissa 
Ben Vereen
Ben Vereen
Carlos 
Bob Corff
Bob Corff
Coel