Coster-Waldau appears as Ser Jaime Lannister in the fourth episode of the fourth season of Game of Thrones, Oathkeeper. Peter Dinklage plays Jaime’s younger brother, Tyrion Lannister. Gwendoline Christie plays Brienne of Tarth, a female soldier loyal to Lady Catelyn Stark. In King’s Landing, Jaime visits Tyrion in his cell as he awaits trial for the murder of King Joffrey Baratheon, Jaime’s son by his incestuous relationship with his twin sister, Queen Regent Cersei Lannister. Tyrion is able to convince Jaime of his innocence, however they agree that the trial will likely find Tyrion guilty. Tyrion tells Jaime that Sansa Stark, his wife by forced marriage, is also wanted for regicide but is innocent. Jaime asks Brienne to find Sansa and keep her safe, giving Brienne a suit of armour and his own Valyrian steel sword to help her quest.