An "unknown force" declares war against planet Earth when the United Nations disobeys warnings to cease and desist in its attempts at assembling the first satellite in the atmosphere.

Dave Boyer

Sybil Carrington

Dr. Pol Van Ponder

Cole Hotchkiss

Jason ibn Akad

Dr. Howard Lazar

John Compo

Brunet Helmsman of Satellite

Mr. LeMoine

Mitzi

The President

Crewman with Gun

Ground Control (uncredited)
May 18, 1958

Dave Boyer

Sybil Carrington

Dr. Pol Van Ponder

Cole Hotchkiss

Jason ibn Akad

Dr. Howard Lazar

John Compo

Brunet Helmsman of Satellite

Mr. LeMoine

Mitzi

The President

Crewman with Gun

Ground Control (uncredited)
