It’s the elephant in the room, but season one put it right out there, so you must know going into Sugar season two: the main character of Apple TV’s neo-noir private detective series is, in fact, a blue-skinned alien. That said, John Sugar, played with a sort of mournful yet optimistic curiosity by Colin Farrell, blends in thanks to his flawless human disguise. But the longer he stays on Earth, the more he’s in danger of some major mental side effects, as well as something his culture dreads more than anything: assimilation. That’s a growing concern because Sugar is stuck on Earth, probably forever. In season one, the broader extraterrestrial mission Sugar was part of came to an abrupt end. The other aliens fled in a hastily organized evacuation, but he decided to stay, hoping to unravel the truth behind his sister’s disappearance. A portion of that unfinished business is resolved within the opening moments of season two. (io9 watched all eight episodes for the purposes of this spoiler-free review.) But that doesn’t mean Sugar is suddenly purged of his ghosts. If anything, he becomes even more haunted. If the use of “Mr. Lonely” as an early needle drop doesn’t clue you in, a big theme this season is Sugar’s existential agony at being the only one of his kind left on the planet.