Some really impressive camerawork and sound design, in addition to the reliable Preminger touchstones of titles by Saul Bass and a judiciously used jazz score. (Some fun diegetic soundtrack in there too)

It takes a while to find its momentum but what a frenetic, insane finale!

Watched again last night. Had forgotten so much of it. RIP Carol Lynley.

Not bad Hitch homage,but there's a cute foreshadowing of the twist. I'll bet you catch it.