The Office of Scientific Investigations recruits and intensively trains astronauts to pilot space rockets to intercept and capture a meteor before it dissolves in Earth's atmosphere. Scientists need to examine the meteor to understand how it withstands cosmic radiation and extreme heat, solving the problem of metal fatigue for safe intergalactic travel.

William Lundigan
as Dr. Richard Donald Stanton

Herbert Marshall
as Dr. Donald L. Stanton / Narrator

Richard Carlson
as Dr. Jerry Lockwood

Martha Hyer
as Dr. Jane Flynn

Dawn Addams
as Susan Manners

Robert Karnes
as Walter Gordon

Lawrence Dobkin
as Dr. Delmar

George Eldredge
as Dr. Paul Dryden

Dan Riss
as Dr. Frank Werner

Michael Fox
as Dr. Klinger