As in all Peter Sellers' satires, "The Mouse That Roared" delivers on laughs. When the cash strapped tiny Duchy of Grand Fenwick comes up with a fool-proof plan to get money by losing a war with the U.S. and then getting post-war aid, the Prime Minister, played by Peter Sellers, forgets to inform the invasion leader, also played by Peter Sellers, that he is supposed to lose. Sellers lands on U.S. soil during an air raid drill only to find empty streets. He promptly captures an important scientist and well-laid plans fly apart! Not Rated.