12 Dumbest Movie Plot Twists Of 2017

3. David Steals Walter's Identity - Alien: Covenant

The Twist: After the Covenant's surviving crew members, Daniels (Katherine Waterston) and Tennessee (Danny McBride), kill the final Xenomorph, they prepare to re-enter stasis on the way to Origae-6.

As Walter (Michael Fassbender) puts Daniels into stasis, she realises that the android is actually his evil "twin" David, who has somehow subdued Walter and taken his place on the Covenant.

The film then ends with the implication that David is going to use two facehugger embryos to continue his experiments.

Why It's Dumb: Though the film ending in such bleak fashion is pretty neat, the David twist is unfortunately so comically obvious that Ridley Scott deciding to make a big reveal out of it made it fall incredibly flat.

The twist is laboured to the point that the audience is just begging everyone to get on with it already, and overall it might've worked better if we actually just saw David defeat Walter.

That way, the suspense would relate to whether or not Daniels would discover David's deception before being put under. Sadly, poor execution ruined what otherwise could've been a chillingly horrifying finale.