RKO studios decided to borrow both William Powell from MGM and Jean Arthur from Columbia, for one of their more big budget efforts to cash in on the popularity of The Thin Man. They succeeded to some degree.
A lot of folks forget that in addition to and earlier than Nick Charles, Bill Powell also played in a few Philo Vance films in the title role. So by this time he was pretty well set in the role. Doctor Bradford is not doing as many liquid lunches as Nick Charles, but the basic blasé Nick is still there. One difference is that while Nick Charles married an heiress, Doctor Bradford works for a living as a physician. That helps in his avocation of detective and in fact it does in this film.
He's got two murders to solve. A jockey falls off a horse coming into the homestretch of a big race and dies for no apparent reason. The trainer suspects something afoot, but he's bumped off by the more conventional method of a bullet. This is after he comes to Bill Powell for help.
Myrna Loy was a more steadying influence on Bill Powell than Jean Arthur was. Arthur plays it as more of a dizzy dame than Loy did. But it works here and she and Powell have good chemistry.
The ever dependable James Gleason is the police inspector in the Sam Levene/Nat Pendleton role. All they needed here was Asta and possibly Eric Blore as Powell's butler was essaying that part.
If Powell and Arthur were signed at this studio we might have seen a whole slew of Bradford films.

Despite positive reviews and screenings at the international festivals, this movie is not for everyone.
The story is very similar to other movies, in which a teenage girl from the family of immigrants needs to overcome many common personal problems of her age, and also to struggle against the pressure of ethnic traditions in her family. She does that by choosing some kind of sport, and with the help of a local boy, that for some reason falls in love with her, she confronts her problems and wins.
In Girlfight it's boxing, in Bend it like Beckham it's soccer, and now it's Kung Fu.
But Fighter is much inferior product than these two, it was simply embarrassing to watch it. Semra Turan, the "actress" that playing the role of a teenage girl, maybe can do a lot of things, but one thing she can't do is to act. Her presence on the screen is anemic and clumsy, the dramatic situations, in which she tries to show some emotions, are dreadful, her body and facial language are of amateur actress, badly instructed by the director. The rest of the cast is a little better, but they just cannot save this cliché movie with stereotypical characters and shallow plot. Besides a few relatively good moments this movie has nothing new or interesting to offer.
Even the kung fu fighting is not a reason to watch this, it's just so boring. The slow motion was really unnecessary, the choreography was basic and lacked the inspiration, and most of the kung fu scenes are just training or standing in all kind of kung fu positions, not actually fighting. Not to mention how ridiculous it looks when a small and skinny girl fights big and muscular boys, and knocks them off their feet.
The only reason this movie has been noticed at all is because it's European. It's very easy to publicize this movie - A first martial arts film from Denmark, but don't be fooled, it's not. It's just a drama about stupid teenage girl and her problems, which are, by the way, not really convincing.
Bad movie with embarrassing lines, acting and story.