NEW YORK ( TheStreet) -- Even if you know nothing about the hit HBO series "Game of Thrones," the feverish cybertalk leading up to Sunday's premiere of Season 3 gives you an indication of the level of interest in the medieval-fantasy TV series. Based on the popular book series A Song of Ice and Fire by George R.R. Martin (and made more popular by the Emmy-winning show), "Game of Thrones'" fanatical fans have risen to epic proportions for a TV series. (Another hit is AMC Network's ( AMCX) "The Walking Dead.") There is every indication that it will keep attracting viewers, so long as show creators David Benioff and D.B. Weiss continue to produce gripping episodes that don't veer too far from the books, but at the same time visually tell the medieval-fantasy tale in short segments for the average viewer. >>>Who Will Win in The Game of Thrones? According to an article last week on WinterisComing.net (a site named after the words representing House Stark, one of the main noble houses in the story), an independent Web site publishing news and information related to the series, the combination of high weekly viewer numbers (11.6 million was the most recent), record sales of season 2 DVD sets and some of the highest-viewed trailers on YouTube in HBO history (not to mention it was the most pirated show in 2012), "you can see why we are optimistic about the ratings once the show returns at the end of the month." So can the success, so far, of the series transfer into equity wins? >>>See Stockpickr's Game of Thrones portfolio In the series -- and perhaps in stock plays -- even an underdog can rise above his station. But like the various warring families in "Game of Thrones," the reality is that no one, not even our beloved characters, are safe in Westeros, so not every stock will have positive movements. As Queen Cersei says: "When you play the 'Game of Thrones,' you either win or you die. There is no middle ground." TheStreet highlighted three stocks loyal to the crown on the following pages.