If you start today, you'll probably have enough time to catch up on the first four seasons of Game of Thrones before the fifth premieres next month on HBO. It's going to take some time, and you might not leave your house on the weekends, but it's definitely possible to watch all 40 episodes in a month.
On the other hand, if you only have 30 seconds to spare between now and April 12th, this video will have to do.
Watch the Game of Thrones cast recap four seasons in 30 seconds