So now, without further ado, here is the twist at the center of Apple TV+’s Sugar. The twist is …
ALIENS

As many viewers already correctly predicted, John Sugar is indeed an alien from outer space. We find this out at the very end of “Go Home” when Sugar injects himself with a crystal-like syringe, removing the technological trick that makes him appear human and revealing his appearance to be that of a blue creature that looks like a cross between Drax and Nebula from Guardians of the Galaxy.
Using our deductive reasoning, it’s safe to assume that Ruby (Kirby Howell-Baptiste) and the rest of Sugar’s peers at the Société Polyglotte Cosmopolitaine are also aliens. A group of multi-lingual aristocrats serves as a good cover for the alien species’ real mission: to observe. We’ve seen how Sugar and company are required to write down their observations from their various jobs in notebooks and pass it along to their superiors.
While every alien in the Société Polyglotte Cosmopolitaine is technically a spy, studying humanity to better understand our ways, they occupy many different roles and positions in society. Sugar, bless him, appears to have gotten the best job of all as a private investigator. At some point Sugar must have developed a real taste for detective movies (perhaps on the spaceship ride to Earth) and his handlers have let him play out his film noir fantasies as part of his research obligations. Unfortunately though, episode 6 reveals that Sugar’s detective cosplay has gone too far.
“They need you to stop looking,” Ruby tells him. “We have to trust that this is for the greater good. Everything is for the mission.”