Despite being shot entirely in black and white, season four's stark "Metalhead" is absolutely brutal. It's one of the season's shorter episodes, and it doesn't spend any time on either the background of the barren world the characters inhabit or the characters themselves. We're dropped directly into the postapocalyptic landscape of the Scottish Moors as one woman (Maxine Peake) attempts to survive a robotic "dog" coming after her.
The episode is one long, incredibly tense chase sequence that will have your stomach in about 50 different knots. That being said, it falls a little flat. The choice to present a bare-bones story was clearly purposeful, but next to the rest of the episodes in this season, it feels hollow. The concept behind the episode is intriguing, but pretty much everything is left open-ended.
