Marvel Released April 1978

Fantastic Four #193

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Published April 1978
Cover Price $0.35
Pages 32

DAY OF THE DEATH-DEMON A creature named Darkoth the Death Demon attacks the NASA space station, where Ben is on hand to dissuade him. He is to later learn a greater truth when he finds that the demon is his old friend Desmond Pitt, an army and flying buddy that Ben had thought long dead!