They Bite / Omnivore

Leading from
(At the time of writing this, I have only read the first half of Dan O'Bannon's They Bite/ Omnivore script as seen in The Bleeding Edge: Dark Barriers, Dark Frontiers and do not know what happens in the second half how many rewrites it has gone through and doesn't show much similarity to the ideas of Alien script. The whole script though is to be found floating around the internet if you ask around carefully.)

Dan O'Bannon wrote "They Bite" in 1975 the year before he wrote Alien, and indeed the script was a pre-curser to Alien. 
He passed it around the studios, and it was well received, but unfortunately this was in a time before Star Wars, and the studios didn't think that the special effects could be done. 
He was told that special effects were a lot art, but he didn't believe that because he thought that stop-motion animation would have handled the bugs in the story nicely, since they were just bugs. 
The jerky strobe effect of stop motion wouldn't have been so apparent. 
For his script, he drew an illustration of the insect shown as having three legs as if it were a miniature Martian war machine from War of The The Worlds, or perhaps it echo of the three legged 5,000,000 year old remains of Martian creatures from "Quatermass And The Pit", 
The creatures from They Bite would remain hidden from man through recorded history and emerging after 65,000, 000 at a modern day archaeological dig. 
This story would have included dozens of these bug like creatures running around.

Basic bug drawing in The Bite / Omnivore by Dan O'Bannon

Bug in its untransformed state

b) Eat, reproduce and duplicate
Dan had the idea that these insects devoured anything organic, such as animals, people, wood, plastic, and they would mimic the thing that they've eaten. 
So after the insect devoured its prey, it dissolved the prey in its highly specialised digestive juices, breaks it down to its molecular components, then copies the DNA patterns and grows a duplicate, except the duplicate is really an insect.
Then the duplicate is only roughly like the creature copied in the way that one might see insects and amphibians that have evolved to look like something else but when you look at it, it only roughly resembles it. 

However rather than just going along with the idea that these creatures resemble what they have eaten because of the DNA patterns that have been copies, these things also can resemble objects that been eaten which changes the idea somewhat. 
So one of them grows to resemble a rubber tire on legs, so it does seem to go far beyond copying the DNA. 
Does it really copy DNA at all? 
Whatever the case the new creature is the old one after it has transformed and shed it's skin.

Bug mimicking a tire

There appear to have been more than one version of the script done, evolving over time when he revisited, Dan might have been talking about a different version of the script from the one in Bleeding Edge: Dark Barriers, Dark Frontiers when talking about how Alien borrowed ideas from it.

Early stage of drawing of dog bug, (a bug mimicking a dog)

Collie dog duplicate bug for They Bite by Dan O'Bannon

c) Reproduction sack
Whatever there is to be said about this method of shapeshifting, this process involves what was basically a stomach sack that might be roughly described as a cocoon
Once the creature has eaten enough, then its skin would harden and a new version of the insect would crawl out although Dan talked about a cocoon that was spun. 
Included in the film story were two of these creatures that had eaten a collie dog and both looked slightly different ugly fiberglass versions of which ever part of the dog they had eaten. 
The creatures are extremely specialised but mindless creatures that simply eat and reproduce and their ability to adapt is beyond belief, they can mimic anything

 Bug (1975) (source:

d) Bug (1975)
Incidentally 1975 was the year that the movie Bug was released which was about an underground form of fire starting cockroach that came to the surface when a large crack in the ground develops after an earthquake but it couldn't live in surface air pressure for very long
Then the main character in the film cross breeds it with a cockroach that lived on a surface, unleashing havoc.

 Bug (1975) (source:

e) Borrowing from They Bite for Alien?
When Dan came to write Alien which had been coming together from lots of bits and pieces of ideas over time, he wrote it using many of the tropes and beats of They Bite, but in a setting that resembled Dark Star. 
It's possible that it had been renamed Drone, and so They Bite was used as a title in 1996 by another film maker and Dan hoping at some point to make the film renamed it Omnivore.  
What I can see though is that the insects in They Bite were polymorphic in their nature when they reproduced and an idea of about the alien would be that the creature in its next stage of its life cycle would something completely different from its previous stage to the point where it was unidentifiable. 
Dan mentioned that the idea of something that was basically cocooning was used in They Bite and we have that as a scene in Alien where characters are cocooned and the alien young grow into the life form that we know of as the spore which was loosely referred to as an egg. 
But while the insects from They Bite appeared to be lying dormant for millions of years, the facehuggers were in a way too but  fully grown just waiting for something to come along that was near enough a host for to implant its seed into. 
There is the idea that the alien beast from Alien has alien DNA combined with human DNA and that's why it has taken a humanoid form, but I don't personally know that the idea came from They Bite. 
In hindsight, it looks as if somehow it must, but it may have just been an idea that came about because they were struggling to find a poetic licence for the alien being roughly man shaped. 
Dan would have preferred that the alien looked less human.

f) Idea explored in Mimic
Years later, films such as the Alien 3 inspired Mimic by Guillermo del Torro would explore the idea of an insect evolving to imitate the form of a human. 
Mimic was based on a very short story of that name by Donald A. Wollheim.

Sources quotes:
  1. Works with Dan O'Bannon on the Storyline of They Bite (later to be retitled Drone) . a scifi movie about ferocious insects that can imitate anything. According to Carpenter, "It was patently ripped off from John W. Campbell's story Who Goes There." (John Carpenter: The Prince of Darkness, p28)
  2. Dan O'Bannon: I badly needed to sell a script,Alien was an idea that had been coming together from lots of bits and pieces over time. So I wrote it and it used many of the tropes and beats of They Bite, but it was in a setting that resembled Dark Star.(
  3. At the end of the story is a missing scene which appears to be well known to the public as the cocoon scene, in which Ripley finds Captain Dallas spun into a web in the hold of the Earthship, Brett and (and at one time) Parker have also been spun into cocoons which are in the process of metamorphosing into the very same type of egg found in the pyramid, thus completing the Alien's life cycle. (Dan O'Bannon's Unseen Alien, Starburst 15, p42
  4. Den of Geek: Moving on to new projects, is They Bite perhaps a return to the vampiric theme of Lifeforce?

    Dan O'Bannon:
    No, it’s closer to Alien really. A few years ago I changed the title of the thing because They Bite sounds like They Live and it does suggest vampires, as you pointed out. I changed the title to Omnivore, but it doesn’t really matter; it’s not about vampires. Actually with They Bite I sort of plagiarised myself. You see, They Bite was not dissimilar to Alien except that it was set on Earth, at a present day archaeological dig, and instead of one monster there were dozens of things running around, bug-like things. I wrote it back in “75, the year before I wrote Alien, and I passed it around the studios and it was actually well-received, but this was pre-Star Wars, and the studios didn’t think the special effects could be done. I remember being told that special effects are a lost art. Well, I didn’t believe that, because I knew that stop-motion animation would have handled the bugs nicely, especially since they were bugs. The jerky strobe effect of stop-motion wouldn’t have been so apparent. So I knew they could be done but the studios didn’t think they could be done. They liked it but they passed on it because of that.

    So when I found myself desperately in need of a sale, I thought, well, they liked They Bite but they thought it was too expensive and didn’t know how to do the effects…if I could write something in a similar vein where it’s obvious that you can do the special effects, then maybe they’ll buy it. So I said I’ll set it on board a spaceship; then the only thing you have to build is the inside of a spaceship. And what’s the easiest way to do a monster? Man in a rubber suit - yeah? So I thought okay, I’ll have one humanoid monster. And of course it has a couple of earlier phases, but they’re small and they don’t move much. And so I wrote it, and yeah, it has a similar tone and feel. It’s not specifically the same.
    Den of Geek:
    In an way it’s like a precursor of Alien, then?

    Dan O'Bannon: Yeah, it’s a precursor of Alien. Those are my two main horror scripts that I’ve written. In subsequent years I was hired to write a couple of horror pieces but I didn’t make any attempt to make them as effective as Alien, because frankly, when I write a script, I live it emotionally. I was fed up with being that kind of frightened and weirded out and that stuff, and I didn’t feel like getting back that deep into that territory again. So when I did Return Of The Living Dead I made it more of a comedy than a horror movie, really. I didn’t really try very hard to make Return scary. ( 
  5. Phobos: Could you tell us a bit about the story
    Dan O'Bannon:
    Well, it's based on a freak of evolution, a primitive insect which branched off early from evolutionary lines of other insects. Its life cycle is so peculiar that it remains hidden from Man through all recorded history. Naturally, my script deals with their re-emergence in modern times. You see, they eat anything organic, animals, people, wood, plastic... and then they mimic the thing that they've eaten
    Phobos: Does it mimic it physically or spin a cocoon or something
    Dan O'Bannon: Basically a cocoon. After the insect has devoured its prey, it dissolves the prey in its highly specialised digestive juices, breaks it down to its molecular components, and then copies the DNA patterns and grows a duplicate... except the duplicate is really an insect. They're extremely specialized creatures. All they do is eat and reproduce. No minds. But they are adaptive beyond belief... they can mimic anything. And they run around eating everything. It's structured as a horror story but I think it's fairly sophisticated. (Phobos No. 1 Summer 1977 (many thanks to DUNE ⟡ MdC & TΛU)
  6. Dan O'Bannon: The producers I showed it to felt it was too weird and that it would be too expensive to do because of the special effects involved. But they all did admit that it frightened them. When I got ready to write ALIEN, I pulled a couple of concepts from THEY BITE and put them into deep space. (Cinefantastique - Volume 8 - Page 24)
  7. Diane O'Bannon: There is also one called THEY BITE, but I think we are going to call it THE OMNIVORE, but that’s a science fiction one. Kind of sci-fi horror about creatures that re-emerge after a 65 million year life-cycle and that one takes place in a desert at an archaeological dig. That one is around to a couple of places but no bites yet. (, DG TALKS TO THE WIFE OF THE LATE DAN O’BANNON Aug 18, 2011 )  
  8. See also script excerpt in: The Bleeding Edge: Dark Barriers, Dark Frontiers


  1. Article about They Bite written 9th March 2016

  2. I've been wondering what THEY BITE was about since reading Dan O'Bannon's letter in an early issue of STARBURST (possibly #9? Star Trek: The Motion Picture cover), in which he promised it would be a worthy follow up to ALIEN. The DNA/replication life-cycle encourages a pet theory I have of ALIEN as oblique remake of FORBIDDEN PLANET. The Space Jockey joined to the ship physically and telepathically, the ship is some kind of temple of the psyche. Maybe the eggs are part of the ship, maybe a fusion of the organic and mechanical, only, like the Krell, the space jockey race couldn't control their base instincts, and the aliens spread through their technology like a cancer. Into this wanders Kane, the ship attempts to absorb him, the chestburster truly is Kane's son in the sense that it is a melding of himself with the alien. As such the alien carries all of Kane's repressed hostilities and desires, like the Id Monster. Hence eliminating all the others and trapping Ripley alone in the shuttle, all to himself (well that's one theory). Thanks once again for your great site!