Spoiler alert: If you're not caught up on Game of Thrones, you probably don't want to read on. But as those who watched Sunday's episode are well aware, Jon Snow is alive. Fans had been wondering about his fate since the end of last season, so in order to keep them guessing, actor Kit Harington's presence on the set had to kept secret. The name "Jon Snow" didn't appear on the scripts, scene breakdowns, call sheets, props, or wardrobe materials, Harington tells Entertainment Weekly. Wherever it would have appeared, "LC" was listed instead.
That stands for "Lord Commander," and the showrunners were serious about its use: "No one was allowed to say 'Jon Snow' on set, ever," Harington says, except when the name was called for in dialogue. "Everyone had to refer to me as 'LC.'" And when producers discussed the character among themselves, they used "LC" as well. Harington has been talking to EW extensively about his surprise return to Thrones; earlier, he told the magazine, "I’d like to say sorry for lying to everyone" and insisting that Snow was permanently dead.