Strangers on a Train, though undoubtedly effective as a classic Hitchcock thriller, is also nothing more complicated than one elongated gay cruise joke-cum-horror story.
Chuck BowenSlant Magazine
Strangers on a Train is also simply a great thriller, yet another illustration of Hitchcock’s awe-inspiring ability to convey more with a single image than most directors can with minutes upon minutes of belabored set pieces.
Significantly, Hitchcock didn't use much of Raymond Chandler's original script, because Chandler was too concerned with the characters' motivation. In place of that, Hitchcock erects a web of guilt around Granger, who 'agreed' to his wife's murder, a murder that suits him very well, and structures his film around a series of set pieces.