Greatest 20 Sci-Fi Movies Worth Watching Released in 1971

In the 25th century, a time when people have designations instead of names, a man, THX 1138, and a woman, LUH 3417, rebel against their rigidly controlled society. Details on THX 1138 / IMDB / YouTube

The world is shocked by the appearance of three talking chimpanzees, who arrived mysteriously in a U.S. spacecraft. They become the toast of society, but one man believes them to be a threat to the human race. See more about Escape from the Planet of the Apes / IMDB / YouTube

Top scientists work feverishly in a secret, state-of-the-art laboratory to discover what killed the citizens of a small town and how the deadly contagion can be stopped. Check out The Andromeda Strain / IMDB / YouTube

Dr Robert Neville has developed an experimental vaccine which makes him the only immune survivor of a biological catastrophe. A gang of homicidal mutants blame science for their condition and attempt to kill him. Get info on The Omega Man / IMDB / YouTube

A mad scientist transforms himself into an aquatic killer. Explore Zaat / IMDB / YouTube

A Victorian scientist tests a serum that transforms him into a lascivious murderess. Info on Dr Jekyll & Sister Hyde / IMDB / YouTube

Vampire Barnabas Collins is accidentally released from his centuries-long confinement at his family's estate in Maine. He targets his clueless descendants who live there now and pursues Maggie, the incarnation of his lost love. Find out about House of Dark Shadows / IMDB / YouTube

Brilliant but arrogant scientist Victor Frankenstein builds a man from spare body parts, only for the monster to come alive and wreak havoc. More about The Horror of Frankenstein / IMDB / YouTube

Sanna escapes being sacrificed and meets Tara. Together, they live in a seaside tribe that worships the Sun God and survive the dangers of the creatures from the Mesozoic Era. See more about When Dinosaurs Ruled the Earth / IMDB / YouTube

Professor Dooley takes home a duck from his research laboratory as a pet for his son, but soon finds out that it lays golden eggs. Look into The Million Dollar Duck / IMDB / YouTube

Dracula conspires with a mad doctor to resurrect the Frankenstein Monster. Explore Dracula vs. Frankenstein / IMDB / YouTube

Space aliens arrive on Earth with their giant shark and intend to take over the planet, but first they must destroy Gamera. Check out Gamera vs. Zigra / IMDB / YouTube

Dr. Roger Girard, a mad scientist who dares to combine two heads onto one body, despite serious consequences. See more about The Incredible 2-Headed Transplant / IMDB / YouTube

A space probe is infiltrated by alien beings and then crashes on a remote Pacific atoll. A group of people discover it to be inhabited by giant mutant monsters, created by the aliens in an attempt to conquer the world. Get info on Space Amoeba / IMDB / YouTube

A team of researchers discovers a strange mutation of man and octopus who proceeds to terrorize them. Read about Octaman / IMDB / YouTube

In prehistoric times, two brothers fight each other for the leadership of their tribe. Find out about Creatures the World Forgot / IMDB / YouTube

Amir, the benevolent ruler of Kalid, is dying, but there is hope. Freshly deceased, he is flown to the United States where Dr. Trenton transplants his brain into the body of a simpleton in a classic assistant got the wrong kind of body plot line. Dr. Trenton has a few nefarious plot twists of his own in mind, and then there's the thing with the dwarf and the women c. Info on Brain of Blood / IMDB / YouTube

A marine scientist volunteers to have his family live in a prototype underwater home to prove it's practical. Details on Hello Down There / IMDB / YouTube

A man who returns to his hometown for a funeral may have a much larger purpose in life than those around him can see. Look into Brother John / IMDB / YouTube

A group of 21st-century colonists inhabit the underwater city called Pacifica. They find they must defend the city against hostile alien forces. Info on City Beneath the Sea / IMDB / YouTube