"Clean Slate" is an engrossing, cleverly plotted comedy, but be warned: if you're looking for belly laughs, this isn't the film for you. It's a plot-driven film that can be categorized as a comedy only because of its light tone. With the same material and a serious approach, this could have been a great Kafka-esque thriller. Carvey is remarkably easy to identify with. (**1/2)