Teenagers from Outer Space by Tom Graeff

The Boy from Outer Space, and originally titled (The Ray Gun Terror) is a 1959 American independent black-and-white science fiction cult film released by Warner Bros. The film was produced, written and directed by Tom Graeff and stars David Love, Dawn Bender, Bryan Grant, Harvey B. Dunn, Tom Graeff and King Moody. Teenagers from Outer Space was distributed theatrically by Warner Bros. on a double feature with Gigantis the Fire Monster. In the film, a young alien named Derek becomes a fugitive on Earth after he defies his crew's directive to eradicate human life in order to use Earth as grazing grounds for giant voracious livestock they call Gargons.