Diretto da:
Fred Warshofsky
Cast:
Rod Serling
Genere:
Documentary
Paese:
Stati Uniti
Lingua:
Inglese
Durata: 1h 34m
Data di uscita: 1975-02-01
IMDb: tt0163783
Sinossi
This documentary examines the speculation that aliens have visited Earth in ancient times, and built structures to which they will return at a future date.