Start with season 1, which opened on Antena 3 on 2 May 2017: nine episodes, through 27 June. Season 2 is six episodes, 16 October to 23 November 2017. Netflix later split those two seasons into 13 and 9 shorter episodes; the rows here are the original broadcast. Then season 3 (19 July 2019, eight episodes), season 4 (3 April 2020, eight episodes) and season 5 (five episodes on 3 September 2021 and five on 3 December 2021). Berlin and the Korean remake are different series.