Pedro Almodóvar and Carmen Maura's personal relationship was seriously damaged during the shooting, which Maura even defined as a "living hell". It took 18 years for them to work again, on Volver - Zurückkehren (2006).
In the opening scene, the film Ivan (Fernando Guillén) and Pepa (Carmen Maura) are dubbing into Spanish is Johnny Guitar - Gejagt, gehaßt, gefürchtet (1954).
The film studio secretary identifies the studio's name as "EXA" over the telephone, the same name as the company that processed the sound, according to the end credits.
Contrary to popular belief, the cab driver is not played by director Pedro Almodóvar, but Guillermo Montesinos.