Parents need to know that Murder on the Orient Express is based on Agatha Christie's classic novel. Kenneth Branagh both directs and stars as iconic detective Hercule Poirot; the rest of the star-studded cast includes Judi Dench, Johnny Depp, Daisy Ridley, Josh Gad, Michelle Pfeiffer, Penelope Cruz, Willem Dafoe, and more. It's a murder mystery, so you can expect violence: Guns are shown (and fired once), and there's a little blood (mostly dried, on a corpse), plus a minor stabbing and some fighting and chasing. There's a verbal description of a terrible crime, the kidnapping and death of a child. Language is very minor -- nothing stronger than "damn." A prostitute is shown and referred to in one scene, and there's a bit of flirting and innuendo. Characters drink alcohol socially on the train, and one of them appears to "need" a drink more than the others (his hands shake). Another character takes a barbiturate called Barbital and seems to be addicted. Characters smoke. The film is smart, colorful, and entertaining in a classical way, which means it may feel a little old-fashioned to some. Christie's book was previously adapted into a film in the 1970s.