Most Similar Movies to Trail of the Screaming Forehead (2007)
If you are looking for movies like Trail of the Screaming Forehead (2007), you might like movies tagged with keyword : scientist, alien, priest, colleague, sailor, townsperson, creepy, campy, hilarious, laboratory, small town, alien invasion, research, experimental medicine, science gone awry, mass hysteria, metamorphosis, escape, pursuit, 1950s .
Alien Trespass (2009), There Goes My Baby (1994), Critters 2 (1988), My Stepmother Is an Alien (1988), Critters 3 (1992), Top of the Food Chain (1999), Evolution (2001) ... Let's take a look at the following list...

Alien Trespass (2009)
In 1950s California a friendly alien (Eric McCormack) enlists the help of a waitress (Jenni Baird) to capture a monster that escaped from his ship after it crashed.
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There Goes My Baby (1994)
Graduates of a Los Angeles high school in 1965 see America's culture and politics gradually change.
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Critters 2 (1988)
Eggs of the small, furry alien carnivores are left behind on Earth and, after hatching, again set their appetites on the town of Grover's Bend.
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My Stepmother Is an Alien (1988)
A creature from another planet tries to seduce a shy Earth physicist to gain control over his researches. The result of this important mission much exceeded her expectations.
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Critters 3 (1992)
The tiny fur ball aliens that will eat anything or anyone set their sights on a Los Angeles apartment tower.
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Top of the Food Chain (1999)
Dr. Karel Lamonte (Campbell Scott) is an atomic scientist visiting the small Canadian town of Exceptional Vista. A meteor hits the town, which has recently lost its main source of revenue, and people start disappearing. While in a bar, Karel meets several locals, including Sandy Fawkes (Fiona Loewi), who takes him back to her motel, where he meets her brother (Tom Everett Scott). As Karel falls in love with Sandy, he must save the town from corpse-eating aliens.
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Evolution (2001)
A fire-fighting cadet, two college professors, and a geeky but sexy government scientist work against an alien organism that has been rapidly evolving since its arrival on Earth inside a meteor.
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Deep Space (1987)
An American satellite with a new biological weapon gets out of control and crashes onto US territory. A slimy monster emerges and manages to escape, killing everyone who crosses his path. Police Lieutenant McLemore gets the job to stop the killing machine.
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Battle Planet (2008)
In the not-so-distant future, Captain Jordan Strider, a Special Forces Officer in the New World Alliance, is chosen for a top-secret mission. Sent to a desolate planet, Terra 219, to arrest possible traitors to the Alliance, Strider must survive with only a government issued experimental suit as protection. Eventually Strider discovers that he has been double crossed:...Read all
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The Troops & Aliens (1979)
In St. Tropez, French gendarme Cruchot and his men battle petroleum-drinking, human-looking, metallic aliens.
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Lifeforce (1985)
A race of space vampires arrives in London and infects the populace, beginning an apocalyptic descent into chaos.
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Aliens in the Attic (2009)
A group of kids must protect their vacation home from invading aliens.
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The Sender (1997)
Special Agent Rafferty is thrown into a maelstrom of action and intrigue when he identifies a mysterious alien race who are on a mission to invade Earth.
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AVPR: Aliens vs Predator - Requiem (2007)
Warring Alien and Predator races descend on a rural Colorado town, where unsuspecting residents must band together for any chance of survival.
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Frankenstein Meets the Space Monster (1965)
A Martian princess and a doctor replace the women on Mars, destroyed by atomic war, by raiding Puerto Rico while a shot down android terrorizes all.
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Monsters vs. Aliens (2009)
A woman transformed into a giant after she is struck by a meteorite on her wedding day becomes part of a team of monsters sent in by the U.S. government to defeat an alien mastermind trying to take over Earth.
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Mars Attacks! (1996)
Earth is invaded by Martians with unbeatable weapons and a cruel sense of humor.
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Save the Green Planet! (2003)
Lee Byeong-gu (Shin Ha-kyun) is convinced that there are aliens from Andromeda among us, plotting to destroy Earth. He believes that Kang Man-shik (Baek Yun-shik), the head of a chemical production company, is their leader, and he kidnaps him. Holing up in his secret lair, Byeong-gu interrogates and tortures the supposed alien, hoping that he will confess to his crimes against humanity and call off the planned destruction of the planet before it is too late.
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