In one of his rare performances without Bud Abbott, Lou Costello plays a rubbish collector and inventor. When radiation in a nearby cave turns his girlfriend into a giantess, antics ensue as he tries to shrink her using one of his inventions.

Lou Costello
as Artie Pinsetter

Dorothy Provine
as Emmy Lou Rossiter

Gale Gordon
as Raven Rossiter

Jimmy Conlin
as Magruder

Charles Lane
as Standard Bates

Robert Burton
as First General

Will Wright
as Pentagon General

Lenny Kent
as Sergeant

Ruth Perrott
as Aunt May

Peter Leeds
as Bill Burton