在城市的阴影中，陈查理运用智慧揭开隐藏的真相。父子换爱全文阅读

　　A scientist working on an important new invention which will protect Allied shipping from U-boat torpedoes has been assigned Secret Service security protection. Amazingly, despite the fact that his laboratory and experiments are located on the upper floor of his Washington mansion, he decides to host a cocktail party for friends on the first floor. Even though several of his gu... (展开全部)