'Game of Thrones' cast gets emotional in behind-the-scenes documentary

After we bid farewell to "Game of Thrones," HBO plans to air a behind-the-scenes documentary about the show's eighth and final season.

In the trailer, you can see some of the cast crying, including Kit Harington who plays Jon Snow.

The show ends Sunday after eight seasons.

The two-hour documentary called "The Last Watch" premieres Sunday, May 26.

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