The premiere episode was reportedly 54 minutes long, and next week's will be 58 minutes. Episode 3 will then be a full 60 minutes long, and after that things will really start to speed up.
Episode 4 of the season (airing on May 5) will be 78 minutes long. Finally, the last two episodes of the season will be 80 minutes each, coming close to the length of a feature film.