Raiders of the Post Ark
Somewhere in the depths of the Mount Pleasant sorting office in London is a mysterious container. The Post Ark, which contains every single letter lost by the Royal Mail since its foundation.
Young Harrison Ford once sent off a postal order for a set of Captain Scarlet picture cards, which depicted scenes from the popular 1960s television series for children. The cards never arrived, and as young Harrison waited for the cards that never came, hope turned to despair, despair turned to anger, anger to bitterness. He has spent decades trying to locate his cards, and has finally tracked them to the Post Ark. He wants his Captain Scarlet cards, and no-one can stop him.