Plot

After being selected at random by a computer to seek safety in an underground bomb shelter

Bomb shelter

A bomb shelter is any kind of a civil defense structure designed to provide protection against the effects of a bomb.-Types of shelter:Different kinds of bomb shelters are configured to protect against different kinds of attack and strengths of hostile explosives. For example, an Air-raid shelter...

 on the eve of a nuclear attack, a group of refugees makes a horrible realization: They're sharing the space with a colony of vampire bats. And since going back above ground isn't an option, they're forced to stay and fight for their lives.

Releases

The film was released theatrically in the United States on May 22, 1974. The original distributor was Columbia Pictures

Columbia Pictures

Columbia Pictures Industries, Inc. is an American film production and distribution company. Columbia Pictures now forms part of the Columbia TriStar Motion Picture Group, owned by Sony Pictures Entertainment, a subsidiary of the Japanese conglomerate Sony. It is one of the leading film companies...

.

The film was released on DVD in a double feature with The Earth Dies Screaming

The Earth Dies Screaming

The Earth Dies Screaming is a 1965 British science fiction film directed by Terence Fisher. It stars Willard Parker, Virginia Field, Dennis Price, Vanda Godsell, Thorley Walters, David Spenser and Anna Palk.-Production:...

 as part of MGM's Midnite Movies

Midnite Movies

Midnite Movies is a line of B movies released first on VHS then on DVD by MGM Home Entertainment then later Sony Pictures Home Entertainment. The line was begun by MGM in March 2001 following its acquisition of Orion Pictures, which bought out Filmways, Inc., the owner of American International...

series.