Tonight the season four finale of Game of Thrones airs on HBO. It's been the show's highest rated season by a large margin,with the series regularly beating all other broadcast and cable Sunday programming. GoT repeatedly hit a 3.9 adults 18-49. Will the finale break the 4.0 barrier? Competition from the NBA Finals could impact its performance. Last week, when GoT went-head-to-head with the basketball championship, it fell to a 3.7 adults 18-49 rating. Make your prediction!