Toi, le venin (aka: Blonde in a White Car; US title: Nude in a White Car; UK title: Night Is Not for Sleep) is a 1959 French mystery film directed and written by Robert Hossein, based on the novel C'est toi le venin... by Frédéric Dard.

The music score was by André Hossein.

The film tells the story of a young man who has affairs with two sisters.

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