how many seasons does the series have in all ?
Five
Black Mirror
The series was originally commissioned by Channel 4 in the United Kingdom and premiered in December 2011. A second series ran during February 2013. In September 2015, Netflix purchased the programme, commissioning a series of 12 episodes later divided into two series of six episodes. The first of these series was released on Netflix worldwide as the overall third series on 21 October 2016. The fourth series was released on 29 December 2017. A fifth series consisting of three episodes was released on 5 June 2019.
what is the meaning of metalhead in black mirror "Metalhead" is filmed entirely in black and white, and follows the plight of Bella (Maxine Peake) trying to flee from robotic "dogs" after the unexplained collapse of human society. when was it premiered? The episode first aired  on 29 December 2017 is this a series? No, "Metalhead" is the fifth episode of the fourth series of the anthology series "Black Mirror" where was this aforesaid series aired? The series premiered for two series on Channel 4 after its addition to the catalogue Netflix purchased the programme who produced it? UNANSWERABLE where did the filming take place? England, largely in Devon and around London
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Black Mirror [SEP] Episodes
The series was originally commissioned by Channel 4 in the United Kingdom and premiered in December 2011. A second series ran during February 2013. In September 2015, Netflix purchased the programme, commissioning a series of 12 episodes later divided into two series of six episodes. The first of these series was released on Netflix worldwide as the overall third series on 21 October 2016. The fourth series was released on 29 December 2017. A fifth series consisting of three episodes was released on 5 June 2019.