where did the filming take place?
England, largely in Devon and around London
Metalhead (Black Mirror)
The 12-day shoot took place in England, largely in Devon and around London. 
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
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Metalhead (Black Mirror) [SEP] Filming
Slade initially received the script in June 2016, while finishing work on the first series of "American Gods". Slade was involved in Peake's casting, and had a large amount of autonomy during filming. A large amount of location scouting was carried out, with Slade looking for "incredibly soft and overcast" light and "desolation". The 12-day shoot took place in England, largely in Devon and around London. With minimal dialogue in the episode, Slade noted that scenes were divided into many brief shots, as scenes utilising green screens would be difficult for Peake. Filming took place on two monochrome cameras, not many of which existed at the time.