Deadline, Sean stars as Mark Hebden, a married father and teacher who killed an innocent man in an accident and, consumed by guilt, accepts his four-year sentence. Separated from his family, he has to learn to adapt quickly to his new environment in order to survive.Stephen portrays a prison officer named Eric Reid, whose kindhearted nature is taken advantage of by a dangerous inmate.The series will be directed by Lewis Arnold, known for his work on the hit science fiction series Humans.The