Mark of the Astro-Zombies

Strange space creatures are planting computer chips inside human brains and replacing organs with synthetic substitutes. The initial plan: Send dozens of mindless Astro-Zombies, armed with razor-sharp machetes, to Earth with orders to indiscriminately slash and kill all in sight! A pair of ruthlessly ambitious criminals study newspaper headlines and recall that these occurrences are somewhat similar to what took place in another time.