"This leaked L/K trailer was made by Fox for advertisers months ago (obviously before they decided not to pick us up)," he Tweets, "Nobody should make anything of its presence on the net. I don't know who put it out there. But it is something Fox had shown me long ago."
The series tells the story of Keyhouse, a New England mansion with fantastic doors that transform all who dare to walk through them. The building is also home to a hate-filled and relentless creature that will not rest until it forces open the most terrible door of them all.
Related: Fox's Locke & Key Adds Sarah Bolger
The pilot was screened at Comic-Con, it was directed by Mark Romanek.