When Colin Farrell was doing press for the first season of the detective series Sugar , he had to be very careful with how he spoke. Sugar is a story about a quirky private detective, but it’s also secretly a work of science fiction, something that doesn’t become clear until halfway through the season. “I knew that I could get the show in deep shit if I revealed certain things,” he tells me. Now as Sugar heads into its next season , which starts streaming on Apple TV on June 19th, Farrell says he feels “unburdened” by the previous veil of secrecy. “There are certain things I wouldn’t mention here about season 2,” he says, “but nothing as big a clanger as the reveal of episode 6 of season 1.” Spoiler warning for the first season of Sugar . That secret is that Farrell’s character, a loveably strange private detective named John Sugar, is actually an alien .…