Complex sentence: The series is set to premiere with a "special preview broadcast" on CBS Television Network in January 2017, with that pilot and all subsequent first-run episodes to then be made available in the United States on CBS All Access.
Split into simpler sentences: The series is set to premiere with a "special preview broadcast" on CBS Television Network in January 2017. The pilot and all subsequent first-run episodes will be available in the United States on CBS All Access.