- Narrator: [Opening Narration] Shortly before dawn, a spaceship landed near Phillipsburg, Colorado, bringing to Earth a strange and ominous cargo: two dozen spores. After exposure to the Earth's atmosphere, each will develop and grow into a perfectly formed alien. On the success of this experiment rests the possibility of future shipments numbering hundreds, perhaps thousands, of alien Invaders and possibility the future of the human race.
- Narrator: [Act I Narration] Several hours ago, a radio newscast carried a strange report. A deputy sheriff in Phillipsburg reported an accident in which the passengers vanished in a burst of flame. A police delusion - or evidence of Invaders?
- Narrator: [Epilog Narration] The destruction of the alien spores becomes a major victory for David Vincent - a continuing, relentless war in which victories are few.