Gangster Squad Official Trailer #1 (2012) The Gangster Squad is an upcoming Crime film directed by Ruben Fleischer, and written by Will Beall. The film stars Ryan Gosling, Emma Stone, Sean Penn, and Josh Brolin. The film is set to be released on October 19, 2012 by Warner Bros. Pictures. A trailer was released on May 9th, 2012. Plot: ------------------------------------------------------ A chronicle of the LAPD's fight to keep East Coast Mafia out of Los Angeles in the 1940s and 1950s. Release date: October 19, 2012. Courtesy: Warner Bros.®