Martin’s Game of Thrones: The Mad King premiered on August 8, 2026, at the Royal Shakespeare Theatre in William Shakespeare’s hometown of Stratford-upon-Avon, England. Game of Thrones: The Mad King. The Mad King is a triumphant tragedy that perfectly captures the spirit of George R.R. At its core, The Mad King is a story of the human heart in conflict with itself. For more information about Game of Thrones: The Mad King, head over to the Royal Shakespeare Company's website.