The machine powering the damping field was also powering a prison, one holding an ancient hostile alien presence.

Through his acts and his deeds, our past and present are again inextricably linked in opposition to the pagan and hostile alien.

In your way are hostile aliens that are sensitive to heat, electricity or noise.

Science doesn't work like the movies, though, and the idea of hostile aliens, armed with metal and malice, seems laughable.

Upon boarding the ship, the soldier discovers it has been overrun by hostile aliens.