Gangster Squad, the upcoming crime drama film by director Ruben Fleischer and based off of the book Tales from the Gangster Squad by Paul Lieberman looks to impress audiences with its superb cast and thrilling action sequences. The film is described as a chronicle of the Los Angeles Police Department's fight to keep East Coast Mafia out of Los Angeles in the 1940s and 1950s. It features a star-studded cast which includes Josh Brolin, Ryan Gosling, Nick Nolte, Giovanni Ribisi, Emma Stone and Sean Penn as the notorious gangster Mickey Cohen. A trailer for the film was released on May 9th, 2012 and the one thing that stood out to me the most in it was Sean Penn. It looks like he is going to provide one very powerful performance in portraying Cohen that is sure to please audiences and give them an esteemed look at one of the most corrupt gangsters ever. The film is set to hit theaters this fall with a release date of September 7th.