Porridge - Season 2 Episode 4 -

Fletch is in the prison hospital,where an unpleasant con called Norris,shortly to be released, has won at gambling the possessions of Blanco,the harmless old orderly. Fletch hatches a plan involving a supposed treasure map which is 'reluctantly' handed over to Norris in exchange for Blanco's things,amongst them a radio. Some days later Fletch and Blanco hear on the radio how Norris,now released,has been arrested for digging for the buried treasure - on a football pitch.