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 is the fourth episode of the third season of Netflix series Who Killed Sara?.

Synopsis
Álex fights for his life in the hospital. A distressed Chema asks his mom for help. A flashback shows how Sara became the focus of Reinaldo's experiment.

Plot
To Be Added

Cast

 * Manolo Cardona as Álex Guzmán
 * Ginés García Millán as César Lazcano
 * Carolina Miranda as Elisa Lazcano
 * Alejandro Nones as Rodolfo Lazcano
 * Claudia Ramírez as Mariana Lazcano
 * Eugenio Siller as José María "Chema" Lazcano
 * Ximena Lamadrid as Sara Guzmán
 * Litzy as Marifer
 * Fátima Molina as Clara
 * Matías Novoa as Nicandro