Creator Álex Pina saw Raquel's story as a formerly abused wife falling in love with the Professor "as very powerful, very romantic"; that they come from two opposite sides was "intended to enhance the genre" and something that the producers "wanted to exploit and it has worked.”[11] Le Monde said, "The game between Professor and Raquel, the inspector in charge of the negotiations, is brilliant. A step of two with fluidity and anticipation.