Scott Riblet sent me an excellent list of sci-fi movie marathon recommendations. They are below for your viewing pleasure. If you want to get picky, not all of them are technically sci-fi (i.e. Desk Set), but they are all arguably at least sci-fi adjacent (i.e. a big computer is involved in Desk set).
Forbidden Planet (1956)
Action | Adventure | Family – Rotten Tomatoes score 98%
A starship crew goes to investigate the silence of a planet’s colony only to find two survivors and a deadly secret that one of them has.
Blast from the past (1999)
A romantic comedy about a naive man who comes out into the world after being in a nuclear fallout shelter for 35 years.
Desk Set (1957)
Two extremely strong personalities clash over the computerization of a TV network’s research department.
The Day the Earth Stood Still (1951)
An alien lands and tells the people of Earth that they must live peacefully or be destroyed as a danger to other planets.
Exam (2009)
The final candidates for a highly desirable corporate job are locked together in an exam room and given a test so simple and confusing that tension begins to unravel.
Cube (1997)
7 complete strangers of widely varying personality characteristics are involuntarily placed in an endless kafkaesque maze containing deadly traps.
Creature from the Black Lagoon (1954)
A strange prehistoric beast lurks in the depths of the Amazonian jungle. A group of scientists try to capture the animal and bring it back to civilization for study.
The Mummy (1932)
A living mummy stalks the beautiful woman he believes is the reincarnation of his lover.
King Kong (1933)
A film crew goes to a tropical island for an exotic location shoot and discovers a colossal giant gorilla who takes a shine to their female blonde star.
The Blob (1958)
An alien lifeform consumes everything in its path as it grows and grows.
7th Voyage of Sinbad (1958)
When a princess is shrunken by an evil wizard, Sinbad must undertake a quest to an island of monsters to cure her and prevent a war.
Thief of Bagdad (1940)
After being tricked and cast out of Bagdad by the evil Jaffar, King Ahmad joins forces with a thief named Abu to reclaim his throne, the city, and the Princess he loves.
Dracula (1931)
The ancient vampire Count Dracula arrives in England and begins to prey upon the virtuous young Mina.
Frankenstein (1931)
An obsessed scientist assembles a living being from parts of exhumed corpses.
