Steven Spielberg returns to alien storytelling with Disclosure Day, a global thriller exploring what happens when humanity learns we are not alone.

Thanks to the prequel's controversial changes to Alien's canon, Ridley Scott's most divisive franchise entry left some major questions unanswered.

Save for the Predator franchise's Yautja and Alien's Xenomorphs, these are the coolest extraterrestrials to ever grace cinema ...