Deadline: Mr Selfridge has added cast for the fourth season, which is expected to return next year. The ITV period drama stars Jeremy Piven as the titular department store impresario with Katherine Kelly, Tom Goodman-Hill, Ron Cook, Amanda Abbington, Amy Beth Hayes, Trystan Gravelle, Sacha Parkinson and Samuel West all coming back. New cast members include Sacha Dhawan (Line Of Duty), Lottie Tolhurst and Mimi Ndiweni (Cinderella). Joining them are Emma Hamilton (The Tudors) and Zoe Richards (How To Become A Criminal Mastermind) as the Dolly Sisters. Harry Selfridge became besotted with the Dollys, groundbreaking performers of their era who were contributors to his fall from grace. The fourth season focuses on that dramatic fall as he loses hold of the empire and social status that he worked so hard to create.