Agatha: House of Harkness is a new Marvel series that serves as a sequel to the popular WandaVision. The show follows Agatha Harkness, the breakout character from WandaVision, as she leads a group of witches on a journey along the Witches' Road, a perilous path that promises power to those who complete its trials. While the series has some weaknesses, including uneven character development and an underwhelming finale, it still stands out as a compelling thriller thanks to its captivating cast, complex themes, and the strong performance of Kathryn Hahn as the titular character.