<P> Bella finds two rotting corpses in the upstairs bedroom, taking car keys and a shotgun from them . The dog has recharged and puts an arm into a slot on the gate to gain access to the building . It takes a knife to replace its damaged arm . As it enters the room where Bella is hiding, she leaps out and throws paint over its visual sensor, and then throws the can to the corner of the room . Hearing it clatter, the dog rushes over and attacks the wall while Bella runs away . She starts the car, but the engine doesn't work . The radio plays "Golden Brown" by The Stranglers . The dog follows the noise and climbs inside the car, attacking . Bella shoots the dog and it stabs her in the leg; she shoots it again and it falls to the ground, motionless . The dog releases another shell which showers Bella with shrapnel . </P> <P> In the bathroom mirror, Bella sees that shrapnel is embedded in her face . She lifts a knife to one of the pieces, but notices a piece of shrapnel in her jugular . Bella speaks into her walkie - talkie, to no response, saying that she won't be coming back and telling her loved ones goodbye . As she puts the knife to her throat, the camera pans out over the landscape where multiple dogs are seen approaching and investigating . In the warehouse, the box's contents have spilled onto the floor: it contained dozens of teddy bears . </P> <P> While series one and two of Black Mirror were shown on Channel 4 in the UK, in September 2015 Netflix commissioned the series for 12 episodes, and in March 2016 it outbid Channel 4 for the rights to distributing the third series, with a bid of $40 million . The 12 episode order was divided into two series of six episodes each . </P> <P> "Metalhead" is the shortest episode of Black Mirror, with a length of 41 minutes . It was filmed in black and white, a decision made by the director David Slade to bring to mind old horror films and to match the "oppressive nature" of the episode . Slade felt that the story presented a world devoid of hope, and filming "a world drained of color felt right". Brooker came up with the episode's central idea by watching videos of Boston Dynamics' robotics products such as BigDog . He found that there was something "creepy" in how the products, if knocked over, would look helpless as they worked to regain their stance . Brooker originally wanted the episode to be entirely free from dialogue, similar to the film All Is Lost . While Brooker's original script featured a human operating the dog from their home, the intention became for the episode to tell "a very simple story" and so Brooker pared back the plot . The final scene, showing a case full of teddy bears, was intended by Slade to be the only "soft and comforting" element of the story . </P>

What is the meaning of metalhead in black mirror