When the Boat Comes In S01E13 - Kind Hearted Rat with a Lifebelt

Les Mallow, the local branch chairman, asks Jack to help him become district secretary of the fitters union. Jack refuses. He then persuades the branch to vote against a strike and to provide financial help to Mrs Downey, the widow of union member. Tom is awaiting trial for theft. Widow Downey - who informed on Tom - is evicted. Jack helps her recover her furniture by breaking into her flat. He then lets himself be arrested. Both he and Tom are sent to Durham jail. A month later, Jack is released to a hero's welcome. As planned, he is now favourite to beat Mallow in the election for district secretary, a post with a salary of £400 a year.