Best Science Fiction Movies of 1971

A scientist keeps having dreams that he is marked for murder by a mysterious tribunal for something that he's not aware that he's done, and that his wife and his friends are part of the conspiracy. Soon he's not sure which is the dream and which is reality.

In a badly-overpopulated future, where each couple is only allowed one child and where people over 65 are forbidden medical care under a very draconian set of laws, a young couple, pregnant with their second child (the first died shortly after birth) enlist the help of an elderly former US Senator to help them escape to Canada.

When virtually all of the residents of Piedmont, New Mexico, are found dead after the return to Earth of a space satellite, the head of the US Air Force's Project Scoop declares an emergency. A group of eminent scientists led by Dr. Jeremy Stone scramble to a secure laboratory and try to first isolate the life form while determining why two people from Piedmont - an old alcoholic and a six-month-old baby - survived. The scientists methodically study the alien life form unaware that it has already mutated and presents a far greater danger in the lab, which is equipped with a nuclear self-destruct device designed to prevent the escape of dangerous biological agents..

A social misfit, Willard is made fun of by his co-workers, and squeezed out of the company started by his deceased father by his boss. His only friends are a couple of rats he raised at home, Ben and Socrates. However, when one of them is killed at work, he goes on a rampage using his rats to attack those who have been tormenting him.

As the first nomadic tribes wander across the vast wilderness of the infant planet they confront hostilities created by the harsh environment and each other. After a massive volcanic eruption a tribal chief is killed and his two sons fight for supremacy, not only for the leadership of the tribe but also for the love of a beautiful young woman. The age-old battlegrounds of rivalry, envy and passion are explored in this tale of prehistoric adventure.

Dracula conspires with a mad doctor to resurrect the Frankenstein Monster.

In the near future, a space station dubbed Earth II is built for the purpose of scientific research and world peace. However, that peace is shattered when the Chinese send up a nuclear bomb that is orbiting just a few miles away from the station. Can the crew disarm the bomb before it detonates, not only destroying the station but setting off World War III?

An enigmatic man (Sidney Poitier) returns to his Alabama hometown as his sister is dying of cancer and incites the suspicion of notable town officials.

UNIT is handling the security for the World Peace Conference in London, but the Master is plotting to plunge the world into war by wrecking it. Posing as Emile Keller, a Professor of Criminology, he goes to Stangmoor Prison in England with a machine that apparently removes the negative (or evil) impulses from the minds of hardened criminals. Actually, the Keller machine is a weapon: it contains an alien mind parasite that stores, and feeds on, these evil impulses.