Porridge (1974)

Old Blanco is doing time for the murder of his wife. He still swears he wasn't guilty. Now he's up before the Parole Board and it looks as if he's sure to be released. Blanco surprises everyone by turning down parole when it's offered to him. He explains that, if he accepts parole, he'll also be admitting that he was guilty of a crime for which he was wrongly convicted. He insists that he'll only leave prison if he's offered a full pardon. Fletcher comes up with a plan to help him.