Based on the sensational ABC-TV series starring Roy Thinnes. The invaders orbit the earth in flying saucers. Some have already landed. The others are waiting. The invaders are merciless, inhuman creatures from a dying planet. They know more about science than we do. They have weapons of incredible power. The invaders have already begun to take over. Their scouts have settled among us. Their agents have infiltrated our highest councils. The invaders must be stopped! But only one man--David Vincent--even knows they exist!

Genre: Science Fiction