It's not often that you see two-hour dramas with only two real characters in them. Sleuth is a great example of how you can take the barest of essentials -- two great actors, one great script, one great set -- and make magic happen. A young Michael Caine matches wits with Laurence Olivier over jewels, a girl, and life & death in what turns out to be a very convoluted plot of cat, mouse, dog, tadpole, and cheese... who has the upper hand on whom? You'll have to wait until the final scene. Highly recommended.