Tom Hiddleston Gets the Bureaucratic Book Thrown at Him in New 'Loki' Trailer Marvel Studios series centered around Thor's mischievous brother will premiere in June Jon Blistein, provided by FacebookTwitterEmail Loki, the upcoming series centered around Thor’s mischievous brother, set to premiere June 11th on Disney+. Loki is set after the events of Avengers: Endgame and finds Tom Hiddleston reprising his role as the titular God of Mischief. As the trailer shows, the series opens with Loki in a lot of hot water with the Time Variance Authority, a bureaucratic agency tasked with protecting the proper flow of time, which Loki rudely disrupted when he stole the Tesseract and broke reality.