Screamers - ( Sci Fi) - 1995

2 soldiers attempting to negotiate the end to a long-running war, discover the robots ( Screamers) they built to assassinate enemy combatants, have become sentiment and are plotting against both sides.
The Screamers have evolved from simple weapons, and now have to ability to mimic humans to infiltrate and kill.
Is the person next to you really human or Screamer?
Who can you trust