INVASIVE SPECIES sci-fi/horror/thriller feature film screenplay

In a post-apocalyptic world where flesh-eating aliens using human bodies as hosts have taken over the planet with martial law, a teenage girl and her younger brother hole up in a house with a man who claims he'll protect them only to find out he's a “feeder” who rounds up humans for the aliens to feast on. She has to grow up fast to figure how to either win him over, kill him or keep him alive in order save herself and her brother. It's Walking Dead meets Invasion of the Body Snatchers meets Panic Room.

Tonally it's very Walking Dead where the cannibals and zombies are essentially fused together into the alien characters. Central themes of trust, survival and hanging on to one's humanity are explored throughout. The peril is reminiscent of Jews hiding out in WWII Nazi occupied Europe and human trafficking. It's a contained thriller, almost entirely set in one house with a juicy limited supporting male villain role that could be a guest celeb name for stunt casting.

Walter is currently seeking production partners for INVASIVE SPECIES.

THE set up

A forest chase. Gwen and her 2 kids, Kayla(16) and Sam(10) evade flesh-eating aliens possessing human bodies. They hide in a run-down house amidst the post-apocalyptic landscape left by an alien invasion that’s enslaved humanity.

The owner of the house, Jude, arrives and everyone hides. Just as Jude is about to discover the kids, Gwen confronts Jude. After a scuffle, Gwen grabs a medicine that stops Jude in his tracks. They make a deal. Jude will let her lay low there then take her to a safe secret location where humans hide out. She agrees to give him his medicine back once she's at the safe spot.

Alien soldiers arrive and Gwen and the kids hide in the basement. Jude takes the aliens into the basement and shows them the humans he’s been holding for them to eat. He has agreed to use his basement to store the humans as a food locker for the aliens. He's mixed up a sedative for the humans to make their last moments a bit more bearable. In exchange the aliens will eventually give him a passport so he can leave and find his son.

When an alien is about to discover the kids in a corner of the basement, Gwen attacks and gets captured. The aliens take Gwen and leave. Now alone, the kids must grow up fast. Do they try to subdue the owner of the house? Do they try to win him over? Or do they risk escaping on their own out in the wild?

Every decision they make is life and death when you're trapped in the house of Feeders.

(full screenplay available upon request - gowalterb@gmail.com)



The world is near future post-apocalyptic just after a war but not one that’s wiped out everything. Civilization exists. It must. The only way the aliens can sustain themselves on Earth is by inhabiting human hosts so their survival depends on keeping their human host bodies alive.


The house is a character in the film. It's run-down, semi-functional. But it feels almost-lived in. At once it's both a place of terror and a place of harbor.


The alien soldiers will look menacing with intimidating uniforms somewhere between Mad Max and the Nazis.

Their outfits are a pastiche of found materials and contraptions use to keep their decaying human bodies from falling apart.

The aliens must constantly possess new (preferably younger) host bodies as they wear out the bodies they inhabit. Interestingly, not only do they possess bodies but they're affected by the residual memories, emotions and feelings of their host bodies. This leads to an interesting chaos inside the minds of the aliens.


The aliens wear down human bodies faster than humans age themselves so they go through a faster decay. The different states of decay will be on display. Since these are alien lifeforms they can decay the human body in strange, unusual and beautiful ways, different from body to body.


"I was driven to tell a story about a young woman coming of age but set in the most dire of environments that test even the strongest of humans. Everyone is the sum of their decisions and with “Invasive Species” I could explore extremely tough decisions with life and death ramifications via the visual vehicle of an alien genre film." - Walter Boholst

Walter Boholst will be the writer, director and producer of INVASIVE SPECIES. Walter is an experienced creative who wrote/directed/co-produced the horror feature film "Voodoo Possession" with Danny Trejo that was distributed in the US by RLJ Entertainment and is available worldwide including territories in Europe, all of the Middle East and all of Latin America. He is also an entertainment attorney of almost 20 years with a specialization in film/TV distribution and foreign sales. His business consulting clients and employers have included Image/RLJ Entertainment (distributor), Dean Devlin's Electric Entertainment (production, distribution, foreign sales) and American Cinema International (foreign sales). His previous industry stints include Assistant Story Editor for MGM Pictures, as a reader for John Davis' Davis Entertainment (Predator, The Man from U.N.C.L.E.) and in foreign sales at Initial Entertainment Group founded by Graham King (The Aviator, The Departed)

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Contact: Walter Boholst - gowalterb@gmail.com

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