When seeing the title credits of the 1966 series about the Ministry, Irene Larra remarks that "the cast is top-notch". The actors playing Julián and Amelia in it are Fernando Guillén and Gemma Cuervo, Cayetana Guillén Cuervo's parents.
Salvador Martí is played by Jaime Blanch . In the TV show inside the TV show, Jaime Blanch is credited as the actor playing Alonso de Entrerríos.