Elisabeth Murdoch, Stacey Snider and Jane Featherstone are joining forces to launch Sister, a global production and development company that will focus on making high-quality television shows, movies, and other forms of entertainment. The move unites Murdoch, the daughter of media mogul Rupert Murdoch and the founder of Shine Group, with two of the entertainment industry’s leading executives. Snider most recently served as chairman and CEO of Twentieth Century Fox, leaving the company after it was acquired by Disney. She also had stints as the co-chairman and CEO of DreamWorks and as chairman of Universal Pictures. The new venture is is being built around Sister Pictures, Featherstone’s Emmy-winning television company. Sister Pictures created last summer’s HBO hit “Chernobyl,” as well as the buzzy thriller “Broadchurch.”