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  ====Season 4====
  In March 2014, Dinklage confirmed that Season 4 would "stick fairly closely" to Tyrion's plot line in ''A Storm of Swords'', adding that "those reversals of fortune really send Tyrion down the rabbit hole." He notes that the character changes in Season 4, and "really ends up in a different place than he thought he was going to. It's fueled a bit by anger towards his family, and trying to find his place in the world. You see that some people rely on drunk, funny Tyrion. I think funny and drunk lasts only so long. He sobers up in many ways. And love is in his life with Shae, and that causes a tremendous amount of damage – because he's vulnerable and he doesn't like to be vulnerable. He's completely stripped of his defense mechanisms." Of Tyrion's relationship with his brother Jaime, Dinklage said, "If you're raised together, you have an unspoken dialogue many times, and it's very easy, especially between Jaime and Tyrion. They have a real friendship, a good brotherhood. They look after each other." As in the novels, Tyrion is (unfairly) found guilty of Joffrey's murder and condemned to death; the HBO series does not use the reveal that his first wife was not really a prostitute to motivate Tyrion to kill his father, and he does not lie to Jaime that he is guilty of killing Joffrey.
  Fearing for Shae's safety, Tyrion breaks up with her and orders her to leave for Pentos. She refuses until he calls her a whore, and declares that she cannot have his children. Joffrey is poisoned to death at his wedding feast, and Cersei immediately accuses Tyrion. At his trial, Shae appears to testify against him, falsely claiming that Sansa refused to bed Tyrion unless he killed Joffrey. Outraged at her betrayal and finally snapping from years of mockery for his dwarfism, Tyrion demands a trial by combat but only after a very intense monologue about the people he hates/despises and the state of affairs. Cersei names the virtually undefeatable Gregor Clegane as her champion. Tyrion is defended by Oberyn Martell, who believes that his sister, niece, and nephew were murdered by Gregor. Oberyn is nearly victorious, but his refusal to kill Gregor without obtaining a confession gives Gregor the opportunity to kill him, and Tyrion is sentenced to death. Before his execution, Tyrion is released by Jaime to be smuggled out of Westeros by Varys. Tyrion decides to confront Tywin before his flight, and finds Shae in his father's bed. Tyrion strangles her to death, and then confronts Tywin on the privy. Tyrion kills his father with a crossbow bolt, and then leaves for Pentos with Varys.