Game of Thrones Alternate Ending, S8E8 "The Lion's Den"

Tyrion is shocked to learn Cersei is engaging the armies of the Living as the Dead attack King's Landing. Arya infiltrates the Red Keep and enlists the aid of Tyrion. Gendry convinces Bran to plea with Daenerys for the sake of Arya and Jon. Jamie and Tyrion confront Cersei as Daenerys continues the assault of the Red Keep.