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)
Comedy | Drama | Romance – Rotten Tomatoes score: 58%
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)
Comedy | Romance – Rotten Tomatoes score: 100%
Two extremely strong personalities clash over the computerization of a TV network’s research department.
The Day the Earth Stood Still (1951)
Drama | Sci-fi | Thriller – Rotten Tomatoes score: 94%
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)
Mystery | Thriller – Rotten Tomatoes score: 63%
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)
Mystery | Sci-fi | Thriller – Rotten Tomatoes score: 62%
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)
Adventure | Horror | Sci-fi – Rotten Tomatoes score – 83%
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)
Horror – Rotten Tomatoes score – 92%
A living mummy stalks the beautiful woman he believes is the reincarnation of his lover.
King Kong (1933)
Adventure | Fantasy | Horror – Rotten Tomatoes score – 98%
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)
Horror | Sci-fi | Thriller – Rotten Tomatoes score – 66%
An alien lifeform consumes everything in its path as it grows and grows.
7th Voyage of Sinbad (1958)
Family | Fantasy | Action – Rotten Tomatoes score – 100%
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)
Adventure | Family | Fantasy – Rotten Tomatoes score – 100%
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)
Horror – Rotten Tomatoes score – 91%
The ancient vampire Count Dracula arrives in England and begins to prey upon the virtuous young Mina.
Frankenstein (1931)
Horror | Sci-fi – Rotten Tomatoes score – 100%
An obsessed scientist assembles a living being from parts of exhumed corpses.





