• Co-executive producer George R.R. Martin arrives for the season premiere of HBO's "Game of Thrones" in San Francisco, California March 23, 2015.

Co-executive producer George R.R. Martin arrives for the season premiere of HBO's "Game of Thrones" in San Francisco, California March 23, 2015. (Photo : REUTERS/Robert Galbraith)

"Game of Thrones" Season 6 on HBO may introduce to viewers another man from the Greyjoy family tree and show a bit more of Ned Stark albeit in flashbacks. These deductions rose in a fan site after a GOT casting call has been reportedly leaked.

Spoiler alert: This update contains "Game of Thrones" Season 5 spoilers. Read on at your own risk if you have not watched the most recent episode on HBO.

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WatchersOnTheWall.com reported getting a GOT casting call from its "great sources." The roles are only described briefly, but the fan site came up with speculations based on characters from George R.R. Martin's "A Song of Ice and Fire" (ASOIAF) book series.

Among the characters the list describes could be a young Ned Stark, the fans noted. One of Theon Greyjoy's uncles is also believed to be showing up in "Game of Thrones" Season 6. Samwell Tarly's father (who got a shout-out from Stannis Baratheon in a recent episode) is also expected to surface.

Septon Meribald who was last featured in "A Feast for Crows" is also in the list of characters expected to appear in "Game of Thrones" Season 6. For those who have read ASOIAF, Meribald showing up could mean more stories about Brienne of Tarth, unless HBO show runners D.B. Weiss and David Benioff alter the character's story line.

So far in "Game of Thrones" Season 5, Brienne and Pod remain in Winterfell, waiting for a sign from Sansa that she needs help. Sansa was skeptical about their intention. But the moment she realizes she could use all the help she can get, Ramsay Bolton has blocked her way to salvation. It remains to be seen whether Sansa could get herself some victory before the end of the season.

The next episode of "Game of Thrones" Season 5 airs this Sunday. There are only three episodes left to air this season.