One on Top of the Other

Dr. George Dumurrier runs a clinic in San Francisco with his brother Henry, while carrying on an affair with a photographer named Jane behind the back of his wife Susan, who suffers from asthma. When Susan dies under mysterious circumstances, George inherits a substantial life-insurance payout, and the police begin to suspect him of arranging her death for the money. His situation worsens when he meets a stripper whose resemblance to his dead wife is startling.

The film is a Spanish-Italian-French mystery thriller directed by Lucio Fulci, the fourth of the nineteen features he made in chronological order, arriving between Massacre Time and A Lizard in a Woman's Skin. Fulci also co-wrote the screenplay with José Luis Martínez Mollá and Roberto Gianviti, and Edmondo Amati produced. Jean Sorel plays George, Marisa Mell takes the dual role of Susan and Monica Weston, and Elsa Martinelli, Alberto de Mendoza, John Ireland and Riccardo Cucciolla appear alongside them.

Released in August 1969, the film runs 108 minutes. On IMDb it holds a rating of 6.6 from around 3,100 votes, and on TMDB a rating of 6.4 from a much smaller base of 96 votes, indicating a widely seen title with a modest but settled reputation among viewers.