Excellent and certainly provocative... If nothing else, the film is a real conversation starter.

If you're interested in the topic at hand, you should just watch it and judge yourself because the reviews have gone very biased by people that didn't even watch it and just hate (or love) the creator. I liked it, it was well written, narrated, and directed and it was about a topic that interests me.

This is one of the best movies I’ve seen in a very long time. You have to go and see this on the big screen.

A clunky actioner with a handful of cool moments.

Although Arnold Rothstein was a great deal older than David Janssen when he portrayed Rothstein in King Of The Roaring Twenties, he does deliver a good performance as the rather bloodless Rothstein who had the heart of a calculating machine. He came by that personality by being a mathematical genius as a child and deciding to apply his talents in the best way calculated to make money. Rothstein in real life and Janssen on the screen spent their lives calculating. In fact the title is something of a misnomer because Rothstein being born in 1882 to a respectable middle class Jewish family with father played in the film by Joseph Schildkraut, started his career way before the Roaring Twenties set in. His most famous exploit, the fixing of the 1919 World Series is certainly before the Twenties, but when Prohibition came in, Rothstein saw the possibilities.The characters in the film are mostly fictional and in some cases pseudonyms are used. Jack Carson's farewell big screen role as Tammany politician Tim O'Brien is more than likely based on Jimmy Hines, later convicted by Thomas E. Dewey. Carson is always good in any film he's in.The two supporting players who stand out are Dan O'Herlihy as a fictional rogue cop who was taking payoffs back when Janssen was a kid and Mickey Rooney who was the best in the film as Rothstein's boyhood pal who meets a tragic end. The women in Rothstein's life are Dianne Foster and British bombshell Diana Dors who do well as typical Roaring Twenties flappers.The film has the look and feel of The Untouchables TV series which spawned a revival of the gangster films, this time using the real names of the public enemies. The smartest one of them all Arnold Rothstein might well have been called, King Of The Roaring Twenties.

With a screenplay by Jo Swerling, this should have been a dynamite movie. However, with direction by Joseph M. Newman, it winds up being a pointless B movie. No action, no movement, not even really any clear character....Given a desire to portray an enigmatic character, David Janssen was a potentially perfect choice for the role of Arnold Rothstein, boss gambler and the man who may have fixed the 1919 World Series. Janssen had a striking ability to show an intelligent character clearly engaged in the moment even as he evaluates the situation disinterestedly, an acting ability that he used to perfection on the small screen in both THE FUGITIVE and HARRY O. Yet, except for his scenes with Mickey Rooney (who finally got the chance in this movie to stretch himself in a real acting assignment and comes off as the best in the cast), we get little of that. Instead we get a movie in which each plot point is mechanically foreshadowed and then shown in a rather dull fashion.There are a few standout performances: Dan O'Herlihy as the corrupt cop is great, but all he does is make you wish the movie is about him. What's going on in his mind and why? Joseph Schildkraut handles his couple of scenes with dignity and care. Jack Carson slides through his role as the head gangster in his typical bluff, understated manner. But the center of this movie starts nowhere, leads nowhere and takes no advantage of any of the strengths of the talents involved.

When I first started going to the movies, I found many actors who had such charisma, I found I was overwhelmed with their persona. Thus it was when I came to select, David Janssen as my all time favorite star. I have seen every movie he has ever made. The good, the bad and the ones I believe, he should have passed by. This is one such film. I so admire Janssen that he is super cool as a private detective, like Richard Diamond, crafty as O'Hara Treasury Agent and he is ultra believable as the innocent escapee, in the TV series, The Fugitive. But although he portrayed 1920's gangster Arnold Rothstein, he is far from threatening enough to personify the infamous double dealing, backstabbing hoodlum who became notorious during the age of the flapper. Furthermore, his sidekick Johnny Burke (Mickey Rooney) played his role as an ignorant stooge and thus garnered more sympathy, than admiration. Finally there was Dan O'Hererlihy, terrific as many an Irishman, but overbearing as a corrupt cop. Ultimately, the story of Arnold Rothstein, social criminal and despicable character, will have to wait until, Hollywood finds somebody, deplorable enough to be hated for what he really was. That surely was not my favorite thespian. **

I am hardly a fan of national film critics, but they are right on the money with this one - it stinks. One major objection is having David Janssen playing the gangster Arnold Rothstein. What kind of casting is that? He couldn't be less credible in that role. Other cast members don't fit in here, either. The whole thing is a mess. The first half hour of this movie doesn't exactly grab your attention, but when the romance sets in, it really puts you to sleep....and really never recovers. "King of the Roaring Twenties" sounds like an interesting, exciting gangster film but is just the opposite. Don't waste your time.