Invisible Invaders

Aliens, contacting scientist Adam Penner, inform him that they have been on the moon for twenty thousand years, undetected due to their invisibility, and have now decided to annihilate humanity unless all the nations of earth surrender immediately. Sequestered in an impregnable laboratory trying to find the aliens' weakness, Penner, his daughter, a no-nonsense army major and a squeamish scientist are attacked from outside by the aliens, who have occupied the bodies of the recently deceased.

• 
  Edward L. Cahn
• 
  Herbert S. Greene
• 
  Dell Ross

• 
  John Agar
  Maj. Bruce Jay
• 
  Jean Byron
  Phyllis Penner
• 
  Philip Tonge
  Dr. Adam Penner
• 
  Robert Hutton
  Dr. John Lamont
• 
  John Carradine
  Dr. Karol Noymann
• 
  Hal Torey
  The Farmer
• 
  Paul Langton
  Lt. Gen. Stone
• 
  Eden Hartford
  WAAF Secretary
• 
  Jack Kenney
  Car Crash Victim
• 
  John Roy
  Game Spectator
• 
  Dick Cherney
  Zombie
• 
  George Bruggeman
  Technician