The fiction focuses on the activities of a judicial police unit led by Corso (Dani Martín),[1] which has to face extreme situations.[2] A distinctive feature of the series is that the episodes opened with the initial part of the climax, reconstructing over the course of the episode how the fiction had come to that point.[3]
The series was the first Globomedia production for Sogecable's channel Cuatro.[4] It also entailed Bárbara Lennie's television debut.[6] The first season consisted of 13 episodes with a running time of roughly 50 minutes.[7][8] The first episode premiered on 8 May 2007.[9] Filming of season 2 included shooting in Miami and the Mediterranean coast in Alicante.[10][8] The 16-episode second season began airing on 10 January 2008.[10][9] The broadcasting run was irregular, with the TV channel rescheduling back and forth the broadcast on different week days and time slots.[9] The broadcasting of the last episode, "Desguace Jiménez, 18:10 horas", was scheduled for the late night slot (23:40) of 1 May 2008.[11]