Captain Clutterbuck's Treasure (S17E05)

When news spreads about a hidden treasure in town, the trio jumps into action to uncover it. They realize they need the assistance of Lieutenant Commander Willoughby, a retired Royal Navy officer, who possesses the sole map to the treasure's location. Foggy takes on the responsibility of securing the 30-pound payment for the map. However, they soon face a dilemma: how many maps were actually sold? Foggy swears off approaching any cash dispensers again...