It says a lot when a movie's true story is as interesting as the A-List cast fronting it.
But the real life story on which Gangster Squad was based is unique on a number of levels - and ones which Ryan Gosling obviously found fascinating.
In our exclusive sneak peek at the DVD and Blu-ray extras, Gosling chats about the inspiration behind his character, and his dedication to keeping the story grounded.
Watch it below and let us know what you think in the comments below.
Loved Gangster Squad? Let us know what you thought in the comments below...