The Great Mud Harvest - S3.E6

Everyone is feeling the pinch and the sheriff sacks Gary to cut costs. The sheriff is almost sacked by the king but avoids it and,along with remaining guard Graeme, takes a trunk containing the king's gold to the bank. Fearing attack they dress up in an elephant costume but the trunk breaks off it and Graeme, mis-hearing the sheriff, takes the elephant's trunk to the bank and leaves the money behind.