Queen Isabella first appears in the series premiere, having recently attained victory over her husband Edward II, whose crown she promptly passes down to her son Edward III. Pursuing a romantic affair with Roger Mortimer, it is later learned that the two had Edward II murdered in his prison cell, and then attempted to cover it up. However they were unable to prevent one of Isabella's former knights, Sir Thomas frome escaping with a parchment that contains evidence of Isabella and Roger's scheme. Though they eventually reclaim the letter and then attempt to burn it to conceal the truth, Edward III discovers the letter and with it as evidence places Roger under arrest. He then has him hanged on the spot, leaving Isabela devastated. She subsequently declares revenge on the city Sir Thomas has