sentences:  In designing the look for the alien creatures, Baker used the time travel plot device as a reason to design "retro" looking aliens reminiscent of science fiction B movies of the era, saying, "In 2012 the aliens should look like "Men in Black" aliens and in 1969 they should be retro aliens.Fishbowl space helmets, guys with space suits with ribbed things on it, exposed brains, [and] bug eyes.