Movies Like The Gamma People

If you liked The Gamma People (1956), a science fiction and horror movie directed by John Gilling, here are 20 movies with a similar feel, based on TMDB's recommendations. Each one links to its cast, trailer and where it's streaming.

1
This Island Earth (1955)
★ 6/10Also science fiction and horror
Aliens have landed and are hiding on Earth, but need Earth’s scientists to help them fight an inter-planetary war.
2
Them! (1954)
★ 6.8/10Also science fiction and horror
As a result of nuclear testing, gigantic, ferocious mutant ants appear in the American desert southwest, and a father-daughter team of entomologists join forces with the state police officer who first discovers their…
3
Godzilla, King of the Monsters! (1956)
★ 6.5/10Also science fiction and horror
During an assignment, foreign correspondent Steve Martin spends a layover in Tokyo and is caught amid the rampage of an unstoppable prehistoric monster the Japanese call 'Godzilla'. The only hope for both Japan and the…
4
Futureworld (1976)
★ 5.9/10Also science fiction
Two years after the Westworld tragedy in the Delos amusement park, the corporate owners have reopened the park following over $1 billion in safety and other improvements. For publicity purposes, reporters Chuck…
5
Island of Lost Souls (1932)
★ 6.9/10Also science fiction and horror
An obsessed scientist conducts profane experiments in evolution, eventually establishing himself as the self-styled demigod to a race of mutated, half-human abominations.
6
The Damned (1962)
★ 6.3/10Also horror and science fiction
An American tourist and a troubled young woman are chased by her gang leader brother to a top secret British government facility that conducts experiments on children.
7
Titan A.E. (2000)
★ 6.6/10Also science fiction
A young man finds out that he holds the key to restoring hope and ensuring survival for the human race, while an alien species called the Drej are bent on mankind's destruction.
8
Space/Time (2025)
★ 5.8/10Also science fiction
After a fatal test shuts down their project, a disgraced team of scientists enters the criminal underworld to rebuild a forbidden space-bending engine that could rescue humanity or annihilate it entirely.
9
Babylon 5: The Legend of the Rangers - To Live and Die in Starlight (2002)
★ 6/10Also science fiction
After being punished for retreat from combat, Ranger David Martel is given command of the Liandra, a haunted 20-year old Minbari fighting ship. He's escorting ambassadors to a secret archaeological site, the oldest…
10
The Incredible Shrinking Man (1957)
★ 7.5/10Also science fiction and horror
A dangerous combination of radiation and insecticide causes the unfortunate Scott Carey to shrink, slowly but surely, until he is only a few inches tall. His home becomes a wilderness where he must survive everything…
11
Babylon 5: A Call to Arms (1999)
★ 6.9/10Also science fiction
Allies of the Shadows seek revenge against humanity. This movie sets up the series, "Crusade," the sequel to "Babylon 5."
12
X: The Unknown (1956)
★ 6.1/10Also horror and science fiction
Army radiation experiments awaken a subterranean monster from a fissure that feeds on energy and proceeds to terrorise a remote Scottish village. An American research scientist at a nearby nuclear plant joins with a…
13
Invasion of the Body Snatchers (1956)
★ 7.5/10Also science fiction and horror
A small-town doctor learns that the population of his community is being replaced by emotionless alien duplicates.
14
G.I. Joe: The Movie (1987)
★ 6.6/10Also science fiction
G.I. Joe faces a new enemy as an ancient society of snake people known as Cobra-La try to forcefully take back the earth from those who drove them underground eons ago.
15
The Invisible Man (1933)
★ 7.5/10Also horror and science fiction
After experimenting on himself and becoming invisible, scientist Jack Griffin, now aggressive due to the drug's effects, seeks a way to reverse the experiment at any cost.
16
Earth vs. the Flying Saucers (1956)
★ 6.1/10Also science fiction
Test space rockets exploding at liftoff and increased reporting of UFO sightings culminate in a direct attempt by alien survivors of a dead, extra-galactic civilization to invade Earth from impervious flying saucers…
17
The Shed (2019)
★ 6/10Also horror
The story of Stan, an orphaned teenager stuck living with his abusive grandfather and tasked with routinely protecting his best friend from high school bullies. When Stan discovers a murderous creature has taken refuge…
18
Ben 10: Alien Swarm (2009)
★ 6.2/10Also science fiction
Ben and a mysterious girl from his past must prevent an alien threat from destroying the world.
19
Cranston Academy: Monster Zone (2020)
★ 6/10Also science fiction and horror
An intelligent 15-year-old high school student is unexpectedly transferred to a boarding school where he opens a portal of monsters from another dimension.
20
Angels Fallen: Warriors of Peace (2024)
★ 5.9/10Also horror
When an Iraq War veteran receives a calling from a higher power, he embarks on a mission to stop a fallen angel from raising an army of the dead to take over the world.