The monsters in this episode are scary and there is plenty of slime, silliness and even a sleigh before Jenna Coleman performs some of her best scenes as an assistant towards the end.
Jenna and Capaldi seem more tactile in this episode and with their on-screen relationship growing, you can see why many fans are keen that they stay together to fight the evil monsters throughout space and time for many episodes to come.
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More tactile? I hope that means lots of kissing and hugging and touching, thank you!