Many watchers aren't happy with the loss of Sandor Clegane AKA The Hound after last season's loss against Brienne of Tarth. While it never exactly shows his death, the character has remained absent from the aired five episodes of this fifth season.
So, those passionate few took their voices to the government's petition website Change.org, in hopes to get the attention of HBO, George R.R. Martin or anyone who could affect the shows writing. They want The Hound back.