Season two left Arya ( Maisie Williams ) going on the lam again and looking for her family.

The HBO series, returning March 31, highlights some of its key players with ominous new imagery.

It's payoff time for Game of Thrones fans. With just a month to go before the HBO series returns for its third season, the network has dropped another batch of tantalizing visuals.

PHOTOS: Game of Thrones Season 3 Character Posters

A set of 12 character posters was released Friday, just a week after the first proper trailer for the season. Among the crop of familiar faces -- Jon Snow (Kit Harington), Daenerys Targaryen (Emilia Clarke), Tyrion Lannister (Peter Dinklage) -- there is one surprise for viewers who haven't read the books.

PHOTOS: 'Game of Thrones' Season 3 Preview

Sandor "The Hound" Clegane (Rory McCann), who hasn't been altogether prominently featured in the first two seasons, gets his own one-sheet. Mazel tov, Hound.

Click through the gallery for a look at all of the character posters.

Game of Thrones' third season premieres at 9 p.m. March 31.

Email: Michael.OConnell@THR.com; Twitter: @MikeyLikesTV