About every ten years I try to watch Serpico. It never gets any better. It's still boring. Al is a great after, the rest of the cast is not. It's like a who's who of bad third rate hacks. And Lumet? Lumet has some great films: Dog Day Afternoon, Network, The Verdict - even Deathrap is watchable. Beyond that, Lumet just has stinker after stinker. He needs a great script - and he had very few of those to work with. Serpico just crawls. The script is terrible. The casting is terrible. So, good luck.