The script for "La Otra" was owned by Warner Bros. and is the same script as the 1964 version, Dead Ringer (1963), starring Bette Davis. Warners chose to pass on making it as a film in the 1940s because it bore too close of a resemblance to the film Davis had just made, A Stolen Life (1946).
The 96-page script, by José Revueltas, Jack Wagner, and Roberto Gavaldón, was originally titled "The Other Woman", from a story by Rian James. The Paul Kohler Agency represented the screenwriters.
Underwent a restoration from a 35mm nitrate print belong to the UNAM Filmoteca.