... and this being a B MGM picture, Van Heflin as Rocky Custer is the civilian sleuth helping the rather befuddled detectives solve a murder, not William Powell.
The picture starts out with a man convicted of murder escaping his police escorts and calling his accuser (Patricia Dane as Mida King), a headliner in a Broadway show. He tells her she doesn't have long to live, and terrified, she leaves in the middle of the show to lock herself in her private railway car. Later she is found dead and, at first, presumed raped.
Unlike the Thin Man movies though, this film rounds up all of the suspects first, and then through them telling their stories in flashback do we find out that Mida was really a pretty awful person and that each person there does have a reason to have killed her. She has been walking on people since the day she hit puberty, and was about to hit her big score in a man with seven million dollars, already planning her Reno divorce before she is even married. The murderer may be guilty of homicide and deserve to go to the chair, but he is probably also eligible for the Jean Hersholt Humanitarian award for disposing of this completely amoral person. Also unlike the Thin Man films, Rocky Custer, our civilian sleuth, and his wife/assistant are also suspects and therefore herded with the others.
The group of suspects is herded from an interview room, to the theatre where Mida worked, and finally to the private car and murder scene itself, usually by Rocky artfully goading and manipulating head detective Gunther (Sam Levene). What is taking so much time here besides the fact that everybody had reason to be glad Mida is dead? The medical examiner is having a terrible time figuring out what exactly killed her.
Having the entire group together the whole time makes the film a bit claustrophobic, but the flashbacks help with that some. Van Heflin is just great here, and stands head and shoulders above the cast with his performance, not that the others are bad. He just takes what could have been a somewhat dull B picture and brings out the best in the other characters, making it almost an A production. Do pay attention to the dialogue - it is fast, furious, and most of it is consequential to the plot. It is easy to miss something.
Just one more comment - somebody in the comment section said that this was a remake of Murder in the Private Car. They share absolutely no similarity in plot other than the fact that railroads are involved. Recommended.
