Porridge 1974 to 1977 (Part 1) - Ronnie Barker - Richard Beckinsale - Fulton Mackay - Brian Wilde

Story The prison life of Fletcher, a criminal serving a five-year sentence, as he strives to bide his time, keep his record clean, and refuses to be ground down by the prison system. Source https://www.imdb.com/title/tt0071036