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  ==== Season 4 ====
  Cersei has Tyrion arrested after Joffrey is fatally poisoned. Mourning and vindictive, it's implied that guilty or innocent, she wants Tyrion dead, while Jaime refuses to believe Tyrion is capable of familial regicide. Indeed, at Tyrion's trial, it is apparent Cersei has manipulated the  proceedings so that the witnesses give either incomplete or entirely false testimonies to implicate Tyrion and Sansa further in the murder. When Tyrion demands a trial by combat, Cersei chooses Ser Gregor "The Mountain" Clegane as royal champion, to further diminish Tyrion's chances, and bribes Bronn via betrothal to a noblewoman, to secure his veto as Tyrion's champion. Cersei's wish comes true when Tyrion's champion, Oberyn Martell, is killed by Clegane. She still refuses to marry Loras, threatening even to reveal the truth of her incestuous relationship with Jaime and their three blond children. Tywin is killed by an escaping Tyrion soon afterward.