A Shot in the Dark (1964)
Best Line: “I believe everything and I believe nothing. I suspect everyone and I suspect no one.”
If you watch just one of the Pink Panther movies, let it be this one. Peter Sellers has never been more effortlessly hilarious as the bumbling detective Inspector Jacques Clouseau. This is also the film that introduced his foils — Commissioner Dreyfus, driven mad by Clouseau’s ineptitude, and Clouseau’s manservant, Cato, instructed to attack his master without warning. Sellers did many sequels, but the humor was never as on target as this one.