In Search Of Ancient Astronauts (1973)

Narrated by Rod Serling, this documentary explores the theory that advanced extraterrestrials arrived on Earth and interacted with early human civilizations thousands of years ago. The program examines ancient artifacts and interviews with paranormal experts and historians.

After suffering two heart attacks, Rod Serling was subjected to a 10-hour long open-heart procedure, carried out on June 26, 1975, but Serling suffered a heart attack on the operating table and died two days later at Strong Memorial Hospital in Rochester, New York. He was 50 years old.