In the movie "Prometheus" the android David flawlessly executes a seemingly endless range of tasks:

  • learns to read and speak an alien language

  • shoots a basketball with precision

  • keeps the spaceship tidy

  • spelunks in a cave

  • performs medical evaluations

  • conducts scientific analysis

  • pilots alien spacecraft

  • makes witty remarks

  • follows orders reliably, even with his head cut off

With all this in mind, why bring anyone but David (or perhaps multiple Davids) on the mission? Wouldn't it be obvious that humans, with all their flaws, would only reduce the odds of success?

  • 3
    +1 good point. cheap crew cost by using humans? :P
    – Dredd
    Commented Mar 13, 2013 at 23:01
  • 1
    <insert standard "because it's a movie" response> Commented Mar 14, 2013 at 2:38
  • 2
    Because the movie would be boring? Compare with The Phantom Menace's battle between the droids and the Gungans. It was boring, because it was CG vs CG. A movie has to have real people to be interesting.
    – Kyralessa
    Commented Mar 14, 2013 at 3:49
  • 1
    @defaultlocale Well, this was the "official" mission. But in the end it was only a pretence for Weyland to search his maker and prolong his life. But without human researchers, there wouldn't be any need for tricking them into participation.
    – Napoleon Wilson
    Commented Mar 14, 2013 at 10:49
  • 1
    Though I still agree that while David was great at everything he did, he was in the end always executing orders. Those orders can be quite complex and he can probably act independently to some degree. But with such a complex mission there are probably situations where a bit more (human) improvisation is needed. At least I would have kept some high-level commanding officers/researchers. And maybe Weyland wasn't sure how well David achieves, being just a prototype, I think. But in the end I also agree with the "because it's a movie"-perspective.
    – Napoleon Wilson
    Commented Mar 14, 2013 at 10:55

3 Answers 3


An in-universe explanation would simply be that the people want to go there themselves. After all, Weyland wanted to travel himself when we could have simply sent a team of humans!

While a ship full of androids could probably complete tasks there'd be no one there making sure the tasks were done as they wished.

From a filmmaker's perspective a single android character creates a much more interesting story and set of interactions than humans and an android.


Without the guidance of a master, androids would ultimately fail on such a long and remote mission.

Despite David's wide range of abilities that he demonstrates through out the film, he fails repeatedly to make his own unique decisions, and when he does make his own decisions he makes poor ones.

  • David monitors the dreaming of Elizabeth Shaw and invades her privacy.
  • Ignoring commands to stop, David opens the chamber to the large human head which sets a chain of events into motion that ultimately gets the crew killed.
  • David must report his progress to Peter Weyland and seek further instructions. Weyland orders him to "try harder".
  • David infects Charlie Holloway and gets him killed.

David's are designed to do tasks that humans don't like to do. Not specifically tasks that they can not do. As mechanical servants they lack the free will to make their own decisions and as such are incapable of completing such a mission on their own.

At best, androids could travel to the planet, record data, conduct tests and report back. Much like a mechanical probe would do. You still need humans there who can ask questions like, "why did the engineers create humans?" or "why do they now want to kill us?".

That Answers Why They Didn't Send All Androids

The other reason is that Wayland was on board the Prometheus, and the only reason David was there was because Wayland trusted him. He thought of him as his son and did not trust his own daughter. The only people on the ship that knew Wayland was there were the security guards, David and Meredith Vickers.

Elizabeth Shaw thought they were on a mission to make a great discovery for mankind, but Wayland had other plans - to contact the engineers and convince them to extend his life. While Wayland could build androids that would never grow old, he himself could not overcome the fact of life - that we all will one day grow old and die.

  • Do we know how many androids exist[ed] in the world at the time? I can't imagine there being too many.
    – Möoz
    Commented Nov 3, 2015 at 21:06
  • @Mooz there were a large number of androids. It was one of the industries that made Wayland wealthy. In the back stories published on the official Prometheus websites it says androids and hyper-sleep were the two biggest advances made by Wayland industries during his lifetime.
    – Reactgular
    Commented Nov 4, 2015 at 0:43
  • Hah, cool, did not know that :)
    – Möoz
    Commented Nov 4, 2015 at 1:15

One take as to why a scientific exploration wouldn't have just androids is the concept of whether androuds can own anything or not. In the world of science, usually the first person to discover something gets to name it. This can be taken as a sort of ownership. Can an inanimate object own something? Would the object's owner own what it discovers? It's a tricky philosophical concept when it comes to sapient non-organic objects.

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