- Fridge Brilliance: Christmas trees, being pines, are monoecious, meaning that they have both "male" and "female" parts on the same tree. They're actually a terrible choice for a story which pulls the "mothers are strong" trope, since they're a "single gender" species. So then, why do these Christmas trees make a big deal about gender? They're not really Christmas trees. They're an alien species that resembles Christmas trees.
- Alternately, the trees wanted a female carrier because their concept of The Ark is a pine cone, i.e. the female part of a coniferous tree. A woman who'd borne children was simply the closest mammalian equivalent of a seed-bearing cone.
- Fridge Horror: What if the Doctor and Co. had shown up when the Doctor intended? They'd either be caught in the middle of the acid rain, or they'd be in the middle of a sea of battery acid.
- Fridge Logic: Why is Cyril sleeping with his glasses on?
Fridge / Doctor Who 2011 CS "The Doctor, the Widow and the Wardrobe"
WARNING! THERE MAY BE UNMARKED SPOILERS!