G | | Drama, Sci-Fi
The European Space Exploration Council sends two astronauts to explore a planet similar to the Earth but located on the opposite side of the sun.
Filmed at the tail end of 1968, this film (like many others of the time) predicted video phone calls. It would take another half a century before one to one video calls became a practical reality.
Col. Glenn Ross:
See you in three weeks.
Dr. John Kane: Let's hope the alarm goes off.
Col. Glenn Ross: It'd better, you made it.
Perturbations caused by the inner planets on each other were carefully measured in the 19th century, leading to the oddity for Mercury that Einstein explained with General Relativity.
An extra counter-Earth would have produced detectable effects that could not have been missed.
Some British prints also featured an additional voice-over during the climax: in the corridor at the nursing home, as he reaches out for the mirror Webb hears Ross' voice telling him, "Jason, we were right. There are definitely two identical planets." (Taken from earlier in the film, this is a line of dialogue that Webb never heard spoken as communications between Webb and Ross were cut mid-sentence.)