The episode centers around the character of Murton, played by David Denman, a ruthless and cunning leader who now controls the train. His backstory and motivations are expertly woven throughout the episode, adding depth to the narrative.

✅ World expansion beyond the train ✅ Higher production value ✅ Ruth & Till being absolute legends

If there's one criticism to be made, it's that the pacing can feel a bit rushed at times. Some plot points and character developments feel a tad convenient or glossed over, but these minor quibbles don't detract from the overall enjoyment of the episode.

From a technical standpoint, the episode's cinematography and production design are as impressive as ever. The visual effects and makeup teams deserve special praise for bringing the frozen world to life and creating a believable, claustrophobic environment within the train.

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