Last Of The Summer Wine S27/E1 'Follow That Bottle'. Peter Sallis Frank Thornton

Intrigued by a bottle with a message inside floating down the river, Truly decides that he has a duty to catch it - after all, it could be a plea for help. With the assistance of Clegg, Billy and Alvin (and Entwistle and his truck) they pursue the bottle on its elusive course and eventually read the mysterious message