Gareth Evans is one of the Western filmmakers who best understood the codes of Asian action cinema. Not surprisingly, the Welshman worked in the field, settling in Indonesia to make martial arts documentaries and create odes to the genius. stomacher by Iko Uwais in Merantau and the two parts of The raid, which became an ultraviolent global success. After creating the series Gangs of London, Evans returns to the coordinates where he was forged with Havoc, a Netflix production that has taken a tortuous four-year path to reach the screens.