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.
Metalhead (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. The dogs were influenced by Boston Dynamics' robots such as BigDog. 
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Metalhead (Black Mirror) [SEP] Introduction
"Metalhead" is the fifth episode of the fourth series of the anthology series "Black Mirror". It was written by series creator Charlie Brooker and directed by David Slade. The episode first aired on Netflix, along with the rest of series four, on 29 December 2017. "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. The dogs were influenced by Boston Dynamics' robots such as BigDog. Filming took place in England, with Lidar scans used for scenes from the dog's perspective.