Filipe Furtado’s review published on Letterboxd:
The Girl Who Knew Too Much is a tale of two movies. It is written as a very tongue in cheek whodunit, full of red herrings, twists, quick close ups on Leticia Roman reacting to "surprises", people getting knifed in the back and so on. At same time, Bava manages to push Hitchcockian woman in peril motif through an intense sense of menace and paranoia. A good deal of The Girl Who Knew Too Much is about Bava's camera negotiating its relationship towards Roman and ther's a sense of danger about it, the image always in neat attack mode. The perils of film exploitation. The goofy humor and the sadistic gaze are not supposed to go well together, but somehow Bava pulls the trick.