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American leading man Lee Patterson (later one of the many stars of One Life to Live) is top-billed in this compact British crime caper. Three thieves from various walks of life combine their forces for a complex heist. The plan is to steal a large cache of loot from a carefully guarded postal delivery; to accomplish this, disguises and "inside men" are vital ingredients. Inevitably the thieves fall out and the best-laid schemes go awry. Mailbag Robbery is ideal viewing for wide-eyed Late Late Show fanatics.