Rocks from a meteor which grow when in contact with water threaten a sleepy Southwestern desert community.

Grant Williams
as Dave Miller

Lola Albright
as Cathy Barrett

Les Tremayne
as Martin Cochrane

Trevor Bardette
as Prof. Arthur Flanders

William Flaherty
as Police Chief Dan Corey

Harry Jackson
as Dr. Steve Hendricks

Richard H. Cutting
as Dr. E.J. Reynolds

Linda Scheley
as Ginny Simpson

Dean Cromer
as Highway Patrolman

Steve Darrell
as Joe Higgins