After 'The Godfather' trilogy, few thought another Mafia movie would come around that could match the complexity, intensity and depth of Francis Ford Coppola's masterpiece. Enter Martin Scorsese.

With a script that left much room for improv and numerous actual Mafia associates to counsel the cast and crew, Scorsese's quasi-biographical tale of Henry Hill, Jimmy Burke and Tommy DeVito immediately became the stuff of gangster picture lore (despite receiving one of the worst preview responses in Warner Bros. history).

Twenty years later, we look back on the people that helped create this Mafia classic.