El nudo is a remake of the Argentine series Amar después de amar, created by and and produced by Atresmedia in collaboration with Diagonal TV. The writing team, coordinated by Nuria Bueno, was formed by José Ángel Lavilla, Nicolás Romero and Nacho Pérez de la Paz. The directors were , and Kiko Ruiz Claverol. Sonia Martínez, Jaume Banacolocha and Montse García were credited as executive producers.
