I have some memories of movies that remember seeing as a kid but can't find them. I'm not sure they exist or not but wanted to know if anyone else knows about them or they're just a figment of my imagination. First, an old black and white. All I remember is it being about alien abduction and specifically an scene of the aliens experimented on a woman and taking her head off. Probably something that inspired the scene in Mars Attacks! Second is more vague. I think it is from the late 70's or early 80's. All I remember is the end of the film where we learn that the enemy are three or four huge computes in an empty room. Another from that time frame is a visit to a planet (Mars?) and we find an hidden civilization and there are shelters or something with people in groups in stasis chambers or similar. Fourth is a movie when an astronaut is returned to Earth (I think) but is slightly out of time phase and can't be scene by anyone. He has a device that allows him to interact and it has communication with his ship that is in his original time. At some point he loses contact with the ship and seems to be trapped in the other time phase. These are probably just fake memories, or me badly misremembering some movies. Any of this sound somewhat familiar to anyone?