Nightmare Alley is forever known in Hollywood as the film in which Tyrone Power made a total break with his typecast image, playing a completely evil and ultimately weak individual. Post World War II, Power made it clear to Darryl Zanuck that he was looking to expand his range as an actor. Zanuck reluctantly allowed him to do this film. He usually indulged his favorite at the studio. Of course he also had a backup plan just in case Nightmare Alley was a bust.
Well critically it wasn't a bust, Power got deservedly rave reviews for his portrayal of small time hustler and carnival sharpie Stan Carlisle. Power had a variation on his previous roles, he was either a straight out hero as in The Mark Of Zorro, Lloyds Of London, or The Razor's Edge. More often he was a combination hero/heel as in Blood And Sand, The Black Swan or A Yank In The RAF most of all in Rose Of Washington Square, probably the closest part to Stan Carlisle he had played before. Still he was never as unredeemingly evil as in Nightmare Alley on screen until his last completed film, Witness For The Prosecution.
Power is working in a small time carnival where Joan Blondell and Ian Keith have a mind reading act with a good code between them that allows Keith to pull some really strange and good answers out of left field. Power would like to learn it and does after Keith dies when he gets into some wood alcohol. Power then teams with Blondell.
He's forced to marry innocent young Coleen Gray when circus strongman Mike Mazurki thinks he's ruined her reputation. But even with the inconvenience of a wife, Power has his eyes on bigger game. He gets a mind reading act going at a swank Chicago nightclub and then partners with Helen Walker who is a quack psychologist.
Ty Power was great in the role, no question about that, but 1947 must have been a great year for scheming women. Helen Walker never gets the credit she's due for her part. She's every bit as bad as Power and more than up to whatever games he's playing. Her part is very similar to Jane Greer's in Out Of The Past which also came out in 1947.
The critics loved Power in Nightmare Alley, but 20th Century Fox took a big loss from it because the public wouldn't accept Power in so evil a role. Darryl Zanuck absolutely knew this would happen so he hedged his bets a little by withholding from release Captain From Castile, a big budget spectacular where you'll Tyrone Power at his most noble and heroic on screen without a bit of heel shading. That came out within six weeks of Nightmare Alley and Power's fans were appeased.
Power's character was a man essentially out of his depth in going for the big con. But as an actor in Nightmare Alley he expanded his range beyond anything anyone ever expected from him. Now Nightmare Alley is considered a cinema classic and box office bust that it was, it remained a personal favorite among Tyrone Power's films.
Though Darryl Zanuck preferred to forget the experience.
