Porridge - Season 2 Episode 3 -

MacKay is transferred to another prison, but Fletch's joy is short-lived when he finds that the replacement is 'Napper' Wainwright, an extremely harsh officer who makes MacKay look like a pussy-cat. To make things worse Fletch's ally Mr. Barraclough is transferred to the prison farm. A plan is concocted where the cons start a riot in defiance of Wainwright, and Barraclough steps in to defuse the situation. Barraclough is thus seen as a hero and Wainwright resigns, to be replaced by MacKay. As MacKay returns the prisoners sing 'For He's a Jolly Good Fellow'.